Cisco Secure Client up to 5.1.19.1862 Secure Firewall Posture module input validation

Summaryinfo

A vulnerability classified as problematic was found in Cisco Secure Client. This vulnerability affects unknown code of the component Secure Firewall Posture module. Executing a manipulation can lead to input validation. This vulnerability is registered as CVE-2026-76462. The attack needs to be launched locally. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic was found in Cisco Secure Client. This vulnerability affects an unknown function of the component Secure Firewall Posture module. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect integrity. CVE summarizes:

A vulnerability in the interprocess communication (IPC) channel of the Secure Firewall Posture module in Cisco Secure Client could allow an authenticated, local attacker to elevate privileges on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a series of crafted IPC messages to a local socket. A successful exploit could allow the attacker to perform limited file write operations on the filesystem with SYSTEM or root privileges. Although this vulnerability affects the Secure Firewall Posture module in Cisco Secure Client on Windows, macOS, and Linux operating systems, this vulnerability could be used to obtain full root privileges on macOS and Linux. For that reason Cisco has assigned this security advisory a Security Impact Rating (SIR) of High rather than Medium as the score indicates.

The advisory is shared for download at sec.cloudapps.cisco.com. This vulnerability was named CVE-2026-76462 since 08/19/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/21/2026).

Upgrading eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Cisco

Name

• Secure Client

Version

• 4.9.00086
• 4.9.01095
• 4.9.02028
• 4.9.03047
• 4.9.03049
• 4.9.04043
• 4.9.04053
• 4.9.05042
• 4.9.06037
• 4.10.00093
• 4.10.01075
• 4.10.02086
• 4.10.03104
• 4.10.04065
• 4.10.04071
• 4.10.05085
• 4.10.05095
• 4.10.05111
• 4.10.06079
• 4.10.06090
• 4.10.07061
• 4.10.07062
• 4.10.07073
• 4.10.08025
• 4.10.08029
• 5.0.00238
• 5.0.00529
• 5.0.00556
• 5.0.01242
• 5.0.02075
• 5.0.03072
• 5.0.03076
• 5.0.04032
• 5.0.05040
• 5.1.0.136
• 5.1.1.42
• 5.1.2.42
• 5.1.3.62
• 5.1.4.74
• 5.1.5.65
• 5.1.6.103
• 5.1.7.80
• 5.1.8.105
• 5.1.8.122
• 5.1.9.113
• 5.1.10.233
• 5.1.11.388
• 5.1.12.146
• 5.1.13.117
• 5.1.13.177
• 5.1.14.145
• 5.1.15.287
• 5.1.16.194
• 5.1.17.3382
• 5.1.17.3394
• 5.1.18.314
• 5.1.19.1862

License

• commercial

Website

• Vendor: https://www.cisco.com/

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