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Vulnerability record · CVE-2020-5913 · published 26 August 2020

CVE-2020-5913: F5 big-ip access policy manager improper certificate validation vulnerability

F5 · Big Ip Access Policy Manager

In versions 15.0.0-15.1.0.1, 14.1.0-14.1.2.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.2, the BIG-IP Client or Server SSL profile ignores revoked certificates, even when a valid CRL is present. This impacts SSL/TLS connections and may result in a man-in-the-middle attack on the connections.

7.4 CVSS 3.1 High EPSS 0.50% · top 59.2% CWE-295 · Improper certificate validation
7.4CVSS 3.1 base score, v2 5.8
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
14Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

In versions 15.0.0-15.1.0.1, 14.1.0-14.1.2.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.2, the BIG-IP Client or Server SSL profile ignores revoked certificates, even when a valid CRL is present. This impacts SSL/TLS connections and may result in a man-in-the-middle attack on the connections.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

14 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://support.f5.com/csp/article/K72752002 Vendor Advisory
https://support.f5.com/csp/article/K72752002 Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-5913), CISA KEV, FIRST EPSS (scores of 2026-10-07). This page is refreshed as NVD updates the record.