Cisco Ios Xe Software
Monthly
Denial of service in Cisco IOS XE Software's web-based management interface allows an authenticated remote attacker with low privileges to reload an affected device by presenting a malformed certificate during authentication. The root cause is insufficient error handling (CWE-126, buffer over-read) in the certificate parsing path of the HTTPS management interface, affecting a broad swath of IOS XE releases from 17.3.x through 26.x. No public exploit code exists and the vulnerability is not listed in CISA KEV, but the wide deployment footprint of IOS XE in enterprise and service provider networks makes even a low-probability DoS meaningful at scale.
Denial-of-service via malformed XMCP packets forces unexpected reloads of Cisco IOS and IOS XE devices, exploitable by any remote unauthenticated attacker. The CVSS scope change (S:C) reflects that the reload impacts the entire device, not just the XMCP subsystem, bringing down all services simultaneously. No public exploit or CISA KEV listing exists at time of analysis, but the zero-authentication, low-complexity attack vector - combined with Cisco's ubiquitous enterprise footprint - makes this a high-priority patching target for network operations teams.
Denial-of-service in Cisco IOS XE Software's web-based management interface (WebUI) allows an authenticated remote attacker holding only low-privilege credentials to render the management interface unresponsive by sending crafted input that bypasses input validation. The vulnerability spans an exceptionally broad version footprint - from 16.9.x through the 26.x release train - making patching scope significant for organizations running Cisco enterprise routing and switching infrastructure. No public exploit has been identified at time of analysis and this CVE is not listed in the CISA Known Exploited Vulnerabilities catalog, placing real-world urgency below its broad scope might suggest.
Unauthenticated remote denial-of-service affecting Cisco IOS XE Software across a wide version range results from multiple improper input validation flaws (CWE-20) discovered during Cisco's internal security hardening review. The CVSS vector (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H) indicates that network-adjacent or internet-facing IOS XE devices can be crashed or rendered unavailable without any credentials or user interaction, with the changed scope (S:C) suggesting impact can extend beyond the directly targeted device to dependent network services. No public exploit code has been identified and this is not listed in CISA KEV, consistent with the internally discovered origin.
Improper neutralization of special elements (CWE-74 injection class) in Cisco IOS XE Software allows remote, unauthenticated attackers to compromise the confidentiality, integrity, and availability of affected network devices, per Cisco's CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N, 9.8 Critical). The flaw was found during an internal Cisco security review and fixed via software hardening releases; there is no public exploit identified at time of analysis and it is not listed in CISA KEV. Because the disclosure is a bundled hardening advisory, the exact injection sink and affected feature/protocol are not specified, so the concrete attack surface is not confirmed from available data.
Unauthenticated remote denial-of-service in Cisco IOS XE Software allows network-accessible attackers to crash IOS processes or force full device reloads by exploiting insufficient control flow management flaws (CWE-691), with a scope-changing availability impact rated CVSS 8.6. The vulnerabilities were discovered internally by Cisco's own engineering team as part of a proactive security review and addressed through software hardening releases - no active exploitation or public proof-of-concept has been identified at time of analysis. The affected version range is exceptionally broad, spanning IOS XE 16.6.x through 26.1.x, meaning virtually every Cisco IOS XE device on networks that has not been recently patched is likely running a vulnerable version.
Denial-of-service conditions in Cisco IOS XE Software stem from multiple incorrect calculation flaws (CWE-682) discoverable over the network without authentication, capable of crashing the affected device and disrupting all traffic transiting it. The CVSS scope change (S:C) indicates impact extends beyond the vulnerable component itself, consistent with a network appliance crash affecting downstream routing and switching functions across an enterprise. Internally discovered and disclosed by Cisco as part of a proactive software hardening initiative, no public exploit identified at time of analysis and CISA KEV status is absent.
Unauthenticated remote attackers can cause high availability impact with scope change on Cisco IOS XE Software through improper control of resources across their lifetime (CWE-664), affecting an exceptionally broad version range from 16.6.x through 26.1.x. The vulnerabilities were discovered proactively by Cisco's internal security engineering team and grouped as a software hardening release, meaning patches were prepared before external threat actor awareness. No public exploit exists and the CVE is absent from CISA KEV, but the AV:N/AC:L/PR:N/UI:N CVSS profile means exploitation requires no authentication or special conditions against any network-accessible IOS XE device.
Remote unauthenticated exploitation of improper memory buffer boundary handling in Cisco IOS XE Software can cause a complete denial of service with Changed scope (S:C), potentially cascading disruption to downstream network segments that depend on the affected routing or switching infrastructure. Affecting an extremely broad range of IOS XE release trains from 16.6.x through 26.1.x across hundreds of specific builds, this vulnerability was discovered and self-reported by Cisco's own engineering team during a proactive internal security hardening review - not in response to observed attacks. No public exploit code or CISA KEV listing has been identified at time of analysis, which moderates near-term opportunistic exploitation risk despite the high CVSS score of 8.6.
Authentication bypass and improper access control in Cisco IOS XE Software allow a remote, unauthenticated attacker to gain unauthorized access with a scope-changing impact affecting confidentiality, integrity, and availability across affected components. The issue was discovered internally by Cisco's engineering team during a proactive security review and is grouped under CWE-284 with a CVSS base score of 9.0, though the high attack complexity (AC:H) indicates non-trivial preconditions. There is no public exploit identified at time of analysis and the issue is not listed in CISA KEV.
Denial-of-service in Cisco IOS XE Software's Blocks Extensible Exchange Protocol (BEEP) feature allows an unauthenticated remote attacker to force an unexpected device reload by sending a specially crafted BEEP SOAP request. The CVSS 8.6 score with Changed scope (S:C) reflects that a device reload disrupts all network services downstream of the affected device, amplifying impact beyond the immediate target. No public exploit or CISA KEV listing has been identified at time of analysis, though the low-complexity, no-authentication attack vector makes this a credible automated threat against any internet- or network-exposed IOS XE device running the BEEP feature.
Denial of service in Cisco IOS XE Software's SNMP subsystem allows an authenticated remote attacker to force an affected device to reload by sending a malformed SNMP request, disrupting all traffic transiting the device. The vulnerability spans all three SNMP protocol versions (1, 2c, and 3) and affects an exceptionally broad version range across both the 3.x, 16.x, and 17.x release trains. No public exploit or CISA KEV listing has been identified at time of analysis, but the scope-change rating (S:C) reflects that a device reload cascades into a network outage for all downstream systems dependent on the affected device.
Denial of service in Cisco IOS XE Software's web-based management interface allows an authenticated remote attacker with low privileges to reload an affected device by presenting a malformed certificate during authentication. The root cause is insufficient error handling (CWE-126, buffer over-read) in the certificate parsing path of the HTTPS management interface, affecting a broad swath of IOS XE releases from 17.3.x through 26.x. No public exploit code exists and the vulnerability is not listed in CISA KEV, but the wide deployment footprint of IOS XE in enterprise and service provider networks makes even a low-probability DoS meaningful at scale.
Denial-of-service via malformed XMCP packets forces unexpected reloads of Cisco IOS and IOS XE devices, exploitable by any remote unauthenticated attacker. The CVSS scope change (S:C) reflects that the reload impacts the entire device, not just the XMCP subsystem, bringing down all services simultaneously. No public exploit or CISA KEV listing exists at time of analysis, but the zero-authentication, low-complexity attack vector - combined with Cisco's ubiquitous enterprise footprint - makes this a high-priority patching target for network operations teams.
Denial-of-service in Cisco IOS XE Software's web-based management interface (WebUI) allows an authenticated remote attacker holding only low-privilege credentials to render the management interface unresponsive by sending crafted input that bypasses input validation. The vulnerability spans an exceptionally broad version footprint - from 16.9.x through the 26.x release train - making patching scope significant for organizations running Cisco enterprise routing and switching infrastructure. No public exploit has been identified at time of analysis and this CVE is not listed in the CISA Known Exploited Vulnerabilities catalog, placing real-world urgency below its broad scope might suggest.
Unauthenticated remote denial-of-service affecting Cisco IOS XE Software across a wide version range results from multiple improper input validation flaws (CWE-20) discovered during Cisco's internal security hardening review. The CVSS vector (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H) indicates that network-adjacent or internet-facing IOS XE devices can be crashed or rendered unavailable without any credentials or user interaction, with the changed scope (S:C) suggesting impact can extend beyond the directly targeted device to dependent network services. No public exploit code has been identified and this is not listed in CISA KEV, consistent with the internally discovered origin.
Improper neutralization of special elements (CWE-74 injection class) in Cisco IOS XE Software allows remote, unauthenticated attackers to compromise the confidentiality, integrity, and availability of affected network devices, per Cisco's CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N, 9.8 Critical). The flaw was found during an internal Cisco security review and fixed via software hardening releases; there is no public exploit identified at time of analysis and it is not listed in CISA KEV. Because the disclosure is a bundled hardening advisory, the exact injection sink and affected feature/protocol are not specified, so the concrete attack surface is not confirmed from available data.
Unauthenticated remote denial-of-service in Cisco IOS XE Software allows network-accessible attackers to crash IOS processes or force full device reloads by exploiting insufficient control flow management flaws (CWE-691), with a scope-changing availability impact rated CVSS 8.6. The vulnerabilities were discovered internally by Cisco's own engineering team as part of a proactive security review and addressed through software hardening releases - no active exploitation or public proof-of-concept has been identified at time of analysis. The affected version range is exceptionally broad, spanning IOS XE 16.6.x through 26.1.x, meaning virtually every Cisco IOS XE device on networks that has not been recently patched is likely running a vulnerable version.
Denial-of-service conditions in Cisco IOS XE Software stem from multiple incorrect calculation flaws (CWE-682) discoverable over the network without authentication, capable of crashing the affected device and disrupting all traffic transiting it. The CVSS scope change (S:C) indicates impact extends beyond the vulnerable component itself, consistent with a network appliance crash affecting downstream routing and switching functions across an enterprise. Internally discovered and disclosed by Cisco as part of a proactive software hardening initiative, no public exploit identified at time of analysis and CISA KEV status is absent.
Unauthenticated remote attackers can cause high availability impact with scope change on Cisco IOS XE Software through improper control of resources across their lifetime (CWE-664), affecting an exceptionally broad version range from 16.6.x through 26.1.x. The vulnerabilities were discovered proactively by Cisco's internal security engineering team and grouped as a software hardening release, meaning patches were prepared before external threat actor awareness. No public exploit exists and the CVE is absent from CISA KEV, but the AV:N/AC:L/PR:N/UI:N CVSS profile means exploitation requires no authentication or special conditions against any network-accessible IOS XE device.
Remote unauthenticated exploitation of improper memory buffer boundary handling in Cisco IOS XE Software can cause a complete denial of service with Changed scope (S:C), potentially cascading disruption to downstream network segments that depend on the affected routing or switching infrastructure. Affecting an extremely broad range of IOS XE release trains from 16.6.x through 26.1.x across hundreds of specific builds, this vulnerability was discovered and self-reported by Cisco's own engineering team during a proactive internal security hardening review - not in response to observed attacks. No public exploit code or CISA KEV listing has been identified at time of analysis, which moderates near-term opportunistic exploitation risk despite the high CVSS score of 8.6.
Authentication bypass and improper access control in Cisco IOS XE Software allow a remote, unauthenticated attacker to gain unauthorized access with a scope-changing impact affecting confidentiality, integrity, and availability across affected components. The issue was discovered internally by Cisco's engineering team during a proactive security review and is grouped under CWE-284 with a CVSS base score of 9.0, though the high attack complexity (AC:H) indicates non-trivial preconditions. There is no public exploit identified at time of analysis and the issue is not listed in CISA KEV.
Denial-of-service in Cisco IOS XE Software's Blocks Extensible Exchange Protocol (BEEP) feature allows an unauthenticated remote attacker to force an unexpected device reload by sending a specially crafted BEEP SOAP request. The CVSS 8.6 score with Changed scope (S:C) reflects that a device reload disrupts all network services downstream of the affected device, amplifying impact beyond the immediate target. No public exploit or CISA KEV listing has been identified at time of analysis, though the low-complexity, no-authentication attack vector makes this a credible automated threat against any internet- or network-exposed IOS XE device running the BEEP feature.
Denial of service in Cisco IOS XE Software's SNMP subsystem allows an authenticated remote attacker to force an affected device to reload by sending a malformed SNMP request, disrupting all traffic transiting the device. The vulnerability spans all three SNMP protocol versions (1, 2c, and 3) and affects an exceptionally broad version range across both the 3.x, 16.x, and 17.x release trains. No public exploit or CISA KEV listing has been identified at time of analysis, but the scope-change rating (S:C) reflects that a device reload cascades into a network outage for all downstream systems dependent on the affected device.