Cisco Secure Endpoint up to 8.4.5.30483 ClamAV buffer overflow

Summaryinfo

A vulnerability classified as critical was found in Cisco Secure Endpoint. This vulnerability affects unknown code of the component ClamAV. Such manipulation leads to buffer overflow. This vulnerability is referenced as CVE-2026-20213. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Cisco Secure Endpoint and classified as critical. Affected by this issue is an unknown function of the component ClamAV. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in the PE file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other expanded impacts, resulting from memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in PE files during scanning, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted file that contains PE content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.

The advisory is shared for download at sec.cloudapps.cisco.com. This vulnerability is handled as CVE-2026-20213 since 10/08/2025. The exploitation is known to be easy. 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 07/01/2026).

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

• Cisco

Name

• Secure Endpoint

Version

• 1.6.0
• 1.7.0
• 1.8.0
• 1.8.1
• 1.8.4
• 1.9.0
• 1.9.1
• 1.10.0
• 1.10.1
• 1.10.2
• 1.11.0
• 1.11.1
• 1.12.0
• 1.12.1
• 1.12.2
• 1.12.3
• 1.12.4
• 1.12.5
• 1.12.6
• 1.12.7
• 1.13.0
• 1.13.1
• 1.13.2
• 1.14.0
• 1.14.1
• 1.15.0
• 1.15.1
• 1.15.2
• 1.15.3
• 1.15.4
• 1.15.5
• 1.15.6
• 1.16.0
• 1.16.1
• 1.16.2
• 1.16.3
• 1.17.0
• 1.17.1
• 1.17.2
• 1.18.0
• 1.18.1
• 1.19.0
• 1.20.0
• 1.20.1
• 1.20.2
• 1.20.3
• 1.20.4
• 1.20.5
• 1.20.6
• 1.20.7
• 1.20.8
• 1.21.0
• 1.21.1
• 1.21.2
• 1.21.3
• 1.22.0
• 1.22.1
• 1.22.2
• 1.22.3
• 1.22.4
• 1.23.0
• 1.23.1
• 1.24.0
• 1.24.1
• 1.24.2
• 1.24.3
• 1.24.4
• 1.24.5
• 1.25.0
• 1.25.1
• 1.25.2
• 1.26.0
• 1.26.1
• 1.27.0
• 1.27.1
• 1.27.2
• 6.0.7
• 6.0.9
• 6.1.5
• 6.1.7
• 6.1.9
• 6.2.1
• 6.2.3
• 6.2.5
• 6.2.9
• 6.2.19
• 6.3.1
• 6.3.3
• 6.3.5
• 6.3.7
• 7.0.5
• 7.1.1
• 7.1.5
• 7.2.3
• 7.2.5
• 7.2.7
• 7.2.11
• 7.2.13
• 7.3.1
• 7.3.3
• 7.3.5
• 7.3.9
• 7.3.13
• 7.3.15
• 7.4.1
• 7.4.1.20425
• 7.4.1.20439
• 7.4.3
• 7.4.3.20679
• 7.4.5
• 7.5.1.20813
• 7.5.1.20833
• 7.5.3
• 7.5.5
• 7.5.7
• 7.5.9
• 7.5.11
• 7.5.13.21586
• 7.5.13.21598
• 7.5.15.21611
• 7.5.17.21680
• 7.5.19
• 7.5.20
• 7.5.21.21732
• 8.0.1.21160
• 8.0.1.21164
• 8.1.3
• 8.1.3.21242
• 8.1.5
• 8.1.5.21322
• 8.1.7
• 8.1.7.21417
• 8.1.7.21512
• 8.1.7.21585
• 8.2.1.21612
• 8.2.1.21650
• 8.2.3.30119
• 8.2.4.30130
• 8.4.0
• 8.4.1.30298
• 8.4.1.30307
• 8.4.2.30317
• 8.4.3
• 8.4.4.30419
• 8.4.4.30467
• 8.4.5.30483

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Entryinfo

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