Secure Firewall Management Center
CVE-2021-34749
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V14 - Data Protection Data exposure prevention
MITRE ATT&CK
2 techniques across 2 tactics: Collection, Discovery The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 8.6 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. |
| Exploit ScenarioDerived | A remote attacker could access sensitive data that should not be disclosed by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAI
A vulnerability in Server Name Identification (SNI) request filtering of Cisco Web Security Appliance (WSA), Cisco Firepower Threat Defense (FTD), and the Snort detection engine could allow an. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Exposure of Sensitive Information vulnerability could allow attackers to access sensitive data that should not be disclosed.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Minimize information in error messages, implement proper access controls, encrypt sensitive data at rest and in transit.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Exposure of Sensitive Information (CWE-200), which allows attackers to access sensitive data that should not be disclosed. A vulnerability in Server Name Identification (SNI) request filtering of Cisco Web Security Appliance (WSA), Cisco Firepower Threat Defense (FTD), and the Snort detection engine could allow an unauthenticated, remote attacker to bypass filtering technology on an affected device and exfiltrate data from a compromised host. This vulnerability is due to inadequate filtering of the SSL handshake. An attacker could exploit this vulnerability by using data from the SSL client hello packet to communicate with an external server. A successful exploit could allow the attacker to execute a command-and-control attack on a compromised host and perform additional data exfiltration attacks. Affected products include: Cisco Ironport Web Security Appliance, Cisco Secure Firewall Management Center, Cisco Firepower Management Center Virtual Appliance Firmware.
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
A vulnerability in Server Name Identification (SNI) request filtering of Cisco Web Security Appliance (WSA), Cisco Firepower Threat Defense (FTD), and the Snort detection engine could allow an unauthenticated, remote attacker to bypass filtering technology on an affected device and exfiltrate data from a compromised host. This vulnerability is due to inadequate filtering of the SSL handshake. An attacker could exploit this vulnerability by using data from the SSL client hello packet to communicate with an external server. A successful exploit could allow the attacker to execute a command-and-control attack on a compromised host and perform additional data exfiltration attacks.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Affected Products (CPE)NVD
Unauthenticated auth bypass in Cisco FMC web interface. CVSS 10.0.
The Threat Management Console in Cisco Firepower Management Center 5.2.0 through 6.0.1 allows remote authenticated users
The web console in Cisco Firepower Management Center 6.0.1 allows remote authenticated users to read arbitrary files via
Cisco Firepower Management Center 6.0.1 has hardcoded database credentials, which allows local users to obtain sensitive
A vulnerability in the stream reassembly component of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services
A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) software could allow an
A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software, formerl
A vulnerability in the web services interface of Cisco Firepower Management Center (FMC) Software could allow an authent
Multiple vulnerabilities in Cisco Firepower Management Center (FMC) Software and Cisco Firepower User Agent Software cou
The web-based GUI in Cisco Firepower Management Center 4.x and 5.x before 5.3.1.2 and 5.4.x before 5.4.0.1 and Cisco Ada
The web-based GUI in Cisco Firepower Management Center 4.x and 5.x before 5.3.0.3, 5.3.1.x before 5.3.1.2, and 5.4.x bef
A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an
GitHub PoC
Exploit-DB