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Snort

21 CVEs product

Monthly

CVE-2026-20068 Mar 04, 18:16 MEDIUM This Month

Snort 3 detection engine contains a vulnerability that allows attackers to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts (CVSS 5.8).

Cisco Information Disclosure Snort Cyber Vision Secure Firewall Threat Defense +1
NVD VulDB
CVSS 3.1
5.8
EPSS
0.1%
CVE-2026-20067 Mar 04, 18:16 MEDIUM This Month

Unauthenticated remote attackers can crash the Snort 3 Detection Engine by sending crafted HTTP packets with malformed Multicast DNS fields, causing a denial of service that interrupts packet inspection across multiple Cisco products. The vulnerability stems from incomplete error checking in HTTP header parsing and requires no authentication or user interaction to trigger. No patch is currently available for this MEDIUM severity issue.

Cisco Memory Corruption Buffer Overflow Snort Cyber Vision +2
NVD VulDB
CVSS 3.1
5.8
EPSS
0.1%
CVE-2026-20066 Mar 04, 18:16 MEDIUM This Month

Cisco Snort 3 Detection Engine can be remotely restarted by an unauthenticated attacker through crafted HTTP packets exploiting improper JavaScript normalization in the JSTokenizer logic, causing a denial of service condition that interrupts packet inspection. The vulnerability requires the JSTokenizer feature to be enabled and can be triggered via an established network connection without authentication. No patch is currently available.

Cisco Denial Of Service Snort Secure Firewall Threat Defense Unified Threat Defense Snort Intrusion Prevention System Engine
NVD VulDB
CVSS 3.1
5.8
EPSS
0.2%
CVE-2026-20065 Mar 04, 18:16 MEDIUM This Month

Snort 3 Detection Engine in multiple Cisco products can be remotely restarted by unauthenticated attackers through crafted packets sent over established connections, due to improper binder module initialization logic. This denial-of-service vulnerability interrupts packet inspection capabilities and can be triggered without authentication or user interaction. No patch is currently available for this medium-severity flaw.

Cisco Information Disclosure Snort Secure Firewall Threat Defense Unified Threat Defense Snort Intrusion Prevention System Engine
NVD VulDB
CVSS 3.1
5.8
EPSS
0.1%
CVE-2026-20058 Mar 04, 18:16 MEDIUM This Month

Snort 3 Detection Engine crashes when processing malformed VBA data due to improper decompression error handling, allowing unauthenticated remote attackers to trigger denial-of-service conditions across multiple Cisco products. An attacker can exploit this vulnerability by sending crafted VBA payloads to cause unexpected engine restarts without requiring authentication or user interaction. No patch is currently available for this medium-severity flaw.

Cisco Denial Of Service Snort Secure Firewall Threat Defennse Unified Threat Defense Snort Intrusion Prevention System Engine
NVD VulDB
CVSS 3.1
5.8
EPSS
0.1%
CVE-2026-20057 Mar 04, 18:16 MEDIUM This Month

Denial of service in Cisco Snort 3's VBA decompression feature allows unauthenticated remote attackers to crash the detection engine by sending maliciously crafted VBA data. The vulnerability stems from insufficient error checking during VBA data processing, enabling attackers to trigger unexpected restarts of the Snort 3 Detection Engine. No patch is currently available for this medium-severity issue affecting multiple Cisco products.

Cisco Denial Of Service Snort Cyber Vision Secure Firewall Threat Defense +1
NVD VulDB
CVSS 3.1
5.8
EPSS
0.1%
CVE-2026-20054 Mar 04, 18:16 MEDIUM This Month

Improper error checking in Cisco Snort 3's VBA decompression feature allows unauthenticated remote attackers to trigger an infinite loop by sending specially crafted VBA data, causing a denial of service condition. The vulnerability affects multiple Cisco products and requires no user interaction or authentication to exploit. No patch is currently available.

Cisco Denial Of Service Snort Cyber Vision Secure Firewall Threat Defense +1
NVD VulDB
CVSS 3.1
5.8
EPSS
0.1%
CVE-2026-20053 Mar 04, 18:16 MEDIUM This Month

Improper range checking in Cisco Snort 3's VBA decompression feature allows unauthenticated remote attackers to trigger a heap buffer overflow by sending crafted VBA data, causing denial of service. The vulnerability affects multiple Cisco products and requires no authentication or user interaction to exploit. No patch is currently available.

Cisco Buffer Overflow Heap Overflow Snort Cyber Vision +2
NVD VulDB
CVSS 3.1
5.8
EPSS
0.1%
CVE-2026-20005 Mar 04, 17:16 MEDIUM This Month

Snort 3 Detection Engine contains a vulnerability that allows attackers to cause a denial of service (DoS) condition when the Snort 3 Detection Engine rest (CVSS 5.8).

Cisco Denial Of Service Cyber Vision Secure Firewall Threat Defense Unified Threat Defense Snort Intrusion Prevention System Engine +1
NVD VulDB
CVSS 3.1
5.8
EPSS
0.1%
CVE-2024-20342 Oct 23, 17:15 HIGH This Week

Multiple Cisco products are affected by a vulnerability in the rate filtering feature of the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured rate. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Authentication Bypass Cisco Snort Firepower Threat Defense Software
NVD VulDB
CVSS 3.1
8.6
EPSS
0.5%
CVE-2024-20363 May 22, 17:16 MEDIUM This Month

Multiple Cisco products are affected by a vulnerability in the Snort Intrusion Prevention System (IPS) rule engine that could allow an unauthenticated, remote attacker to bypass the configured rules. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Authentication Bypass Cisco Firepower Threat Defense Unified Threat Defense Snort Intrusion Prevention System Engine Snort
NVD
CVSS 3.1
5.8
EPSS
0.4%
CVE-2023-20246 Nov 01, 18:15 MEDIUM This Month

Multiple Cisco products are affected by a vulnerability in Snort access control policies that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Authentication Bypass Snort Firepower Threat Defense Ios Xe
NVD VulDB
CVSS 3.1
5.3
EPSS
0.6%
CVE-2021-40116 Oct 27, 19:15 HIGH This Week

Multiple Cisco products are affected by a vulnerability in Snort rules that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.The. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Denial Of Service Firepower Threat Defense Secure Firewall Management Center Snort
NVD
CVSS 3.1
7.5
EPSS
1.3%
CVE-2021-40114 Oct 27, 19:15 HIGH This Week

Multiple Cisco products are affected by a vulnerability in the way the Snort detection engine processes ICMP traffic that could allow an unauthenticated, remote attacker to cause a denial of service. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Denial Of Service Firepower Threat Defense Secure Firewall Management Center Unified Threat Defense +1
NVD VulDB
CVSS 3.1
7.5
EPSS
2.4%
CVE-2021-1495 Apr 29, 18:15 MEDIUM This Month

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Authentication Bypass Firepower Threat Defense Ios Xe Snort
NVD VulDB
CVSS 3.1
5.3
EPSS
1.7%
CVE-2021-1236 Jan 13, 22:15 MEDIUM This Month

Multiple Cisco products are affected by a vulnerability in the Snort application detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Authentication Bypass Ios Xe Firepower Threat Defense Secure Firewall Management Center +1
NVD VulDB
CVSS 3.1
5.3
EPSS
2.1%
CVE-2021-1224 Jan 13, 22:15 MEDIUM This Month

Multiple Cisco products are affected by a vulnerability with TCP Fast Open (TFO) when used in conjunction with the Snort detection engine that could allow an unauthenticated, remote attacker to. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Authentication Bypass Firepower Threat Defense Secure Firewall Management Center Ios Xe +13
NVD VulDB
CVSS 3.1
5.3
EPSS
2.0%
CVE-2021-1223 Jan 13, 22:15 HIGH This Week

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Authentication Bypass Firepower Threat Defense Secure Firewall Management Center Ios Xe +1
NVD VulDB
CVSS 3.1
7.5
EPSS
2.0%
CVE-2020-3299 Oct 21, 19:15 MEDIUM This Month

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured File Policy for HTTP. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Authentication Bypass Firepower Threat Defense Snort
NVD VulDB
CVSS 3.1
5.8
EPSS
2.3%
CVE-2017-6657 May 16, 17:29 HIGH This Week

Cisco Sourcefire Snort 3.0 before build 233 mishandles Ether Type Validation. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Denial Of Service Cisco Snort
NVD
CVSS 3.0
7.5
EPSS
0.5%
CVE-2016-1417 Jan 23, 21:59 HIGH POC This Week

Untrusted search path vulnerability in Snort 2.9.7.0-WIN32 allows remote attackers to execute arbitrary code and conduct DLL hijacking attacks via a Trojan horse tcapi.dll that is located in the same. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

RCE Snort
NVD VulDB
CVSS 3.0
8.8
EPSS
4.3%
EPSS 0% CVSS 5.8
MEDIUM This Month

Snort 3 detection engine contains a vulnerability that allows attackers to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts (CVSS 5.8).

Cisco Information Disclosure Snort +3
NVD VulDB
EPSS 0% CVSS 5.8
MEDIUM This Month

Unauthenticated remote attackers can crash the Snort 3 Detection Engine by sending crafted HTTP packets with malformed Multicast DNS fields, causing a denial of service that interrupts packet inspection across multiple Cisco products. The vulnerability stems from incomplete error checking in HTTP header parsing and requires no authentication or user interaction to trigger. No patch is currently available for this MEDIUM severity issue.

Cisco Memory Corruption Buffer Overflow +4
NVD VulDB
EPSS 0% CVSS 5.8
MEDIUM This Month

Cisco Snort 3 Detection Engine can be remotely restarted by an unauthenticated attacker through crafted HTTP packets exploiting improper JavaScript normalization in the JSTokenizer logic, causing a denial of service condition that interrupts packet inspection. The vulnerability requires the JSTokenizer feature to be enabled and can be triggered via an established network connection without authentication. No patch is currently available.

Cisco Denial Of Service Snort +2
NVD VulDB
EPSS 0% CVSS 5.8
MEDIUM This Month

Snort 3 Detection Engine in multiple Cisco products can be remotely restarted by unauthenticated attackers through crafted packets sent over established connections, due to improper binder module initialization logic. This denial-of-service vulnerability interrupts packet inspection capabilities and can be triggered without authentication or user interaction. No patch is currently available for this medium-severity flaw.

Cisco Information Disclosure Snort +2
NVD VulDB
EPSS 0% CVSS 5.8
MEDIUM This Month

Snort 3 Detection Engine crashes when processing malformed VBA data due to improper decompression error handling, allowing unauthenticated remote attackers to trigger denial-of-service conditions across multiple Cisco products. An attacker can exploit this vulnerability by sending crafted VBA payloads to cause unexpected engine restarts without requiring authentication or user interaction. No patch is currently available for this medium-severity flaw.

Cisco Denial Of Service Snort +2
NVD VulDB
EPSS 0% CVSS 5.8
MEDIUM This Month

Denial of service in Cisco Snort 3's VBA decompression feature allows unauthenticated remote attackers to crash the detection engine by sending maliciously crafted VBA data. The vulnerability stems from insufficient error checking during VBA data processing, enabling attackers to trigger unexpected restarts of the Snort 3 Detection Engine. No patch is currently available for this medium-severity issue affecting multiple Cisco products.

Cisco Denial Of Service Snort +3
NVD VulDB
EPSS 0% CVSS 5.8
MEDIUM This Month

Improper error checking in Cisco Snort 3's VBA decompression feature allows unauthenticated remote attackers to trigger an infinite loop by sending specially crafted VBA data, causing a denial of service condition. The vulnerability affects multiple Cisco products and requires no user interaction or authentication to exploit. No patch is currently available.

Cisco Denial Of Service Snort +3
NVD VulDB
EPSS 0% CVSS 5.8
MEDIUM This Month

Improper range checking in Cisco Snort 3's VBA decompression feature allows unauthenticated remote attackers to trigger a heap buffer overflow by sending crafted VBA data, causing denial of service. The vulnerability affects multiple Cisco products and requires no authentication or user interaction to exploit. No patch is currently available.

Cisco Buffer Overflow Heap Overflow +4
NVD VulDB
EPSS 0% CVSS 5.8
MEDIUM This Month

Snort 3 Detection Engine contains a vulnerability that allows attackers to cause a denial of service (DoS) condition when the Snort 3 Detection Engine rest (CVSS 5.8).

Cisco Denial Of Service Cyber Vision +3
NVD VulDB
EPSS 1% CVSS 8.6
HIGH This Week

Multiple Cisco products are affected by a vulnerability in the rate filtering feature of the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured rate. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Authentication Bypass Cisco Snort +1
NVD VulDB
EPSS 0% CVSS 5.8
MEDIUM This Month

Multiple Cisco products are affected by a vulnerability in the Snort Intrusion Prevention System (IPS) rule engine that could allow an unauthenticated, remote attacker to bypass the configured rules. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Authentication Bypass Cisco Firepower Threat Defense +2
NVD
EPSS 1% CVSS 5.3
MEDIUM This Month

Multiple Cisco products are affected by a vulnerability in Snort access control policies that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Authentication Bypass Snort +2
NVD VulDB
EPSS 1% CVSS 7.5
HIGH This Week

Multiple Cisco products are affected by a vulnerability in Snort rules that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.The. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Denial Of Service Firepower Threat Defense +2
NVD
EPSS 2% CVSS 7.5
HIGH This Week

Multiple Cisco products are affected by a vulnerability in the way the Snort detection engine processes ICMP traffic that could allow an unauthenticated, remote attacker to cause a denial of service. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Denial Of Service Firepower Threat Defense +3
NVD VulDB
EPSS 2% CVSS 5.3
MEDIUM This Month

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Authentication Bypass Firepower Threat Defense +2
NVD VulDB
EPSS 2% CVSS 5.3
MEDIUM This Month

Multiple Cisco products are affected by a vulnerability in the Snort application detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Authentication Bypass Ios Xe +3
NVD VulDB
EPSS 2% CVSS 5.3
MEDIUM This Month

Multiple Cisco products are affected by a vulnerability with TCP Fast Open (TFO) when used in conjunction with the Snort detection engine that could allow an unauthenticated, remote attacker to. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Authentication Bypass Firepower Threat Defense +15
NVD VulDB
EPSS 2% CVSS 7.5
HIGH This Week

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Authentication Bypass Firepower Threat Defense +3
NVD VulDB
EPSS 2% CVSS 5.8
MEDIUM This Month

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured File Policy for HTTP. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cisco Authentication Bypass Firepower Threat Defense +1
NVD VulDB
EPSS 0% CVSS 7.5
HIGH This Week

Cisco Sourcefire Snort 3.0 before build 233 mishandles Ether Type Validation. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Denial Of Service Cisco Snort
NVD
EPSS 4% CVSS 8.8
HIGH POC This Week

Untrusted search path vulnerability in Snort 2.9.7.0-WIN32 allows remote attackers to execute arbitrary code and conduct DLL hijacking attacks via a Trojan horse tcapi.dll that is located in the same. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

RCE Snort
NVD VulDB

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