CVE-2021-22981: f5 big-ip_access_policy_manager
Vulnerability summary
CVE-2021-22981 is a medium (CVSS 5.8) vulnerability in f5 big-ip_access_policy_manager. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 45.2% of scored vulnerabilities.
Timeline
- 12-02-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
On all versions of BIG-IP 12.1.x and 11.6.x, the original TLS protocol includes a weakness in the master secret negotiation that is mitigated by the Extended Master Secret (EMS) extension defined in RFC 7627. TLS connections that do not use EMS are vulnerable to man-in-the-middle attacks during renegotiation. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
0.56%
Chance of exploitation in the next 30 days
Percentile
45%
Versus all other CVEs
30-day change
0.00 pp
From 0.56% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
F514 products
- big-ip_access_policy_manager≥ 11.6.1, ≤ 11.6.5 | ≥ 12.1.0, ≤ 12.1.5
- big-ip_advanced_firewall_manager≥ 11.6.1, ≤ 11.6.5 | ≥ 12.1.0, ≤ 12.1.5
- big-ip_advanced_web_application_firewall≥ 11.6.1, ≤ 11.6.5 | ≥ 12.1.0, ≤ 12.1.5
- big-ip_analytics≥ 11.6.1, ≤ 11.6.5 | ≥ 12.1.0, ≤ 12.1.5
- big-ip_application_acceleration_manager≥ 11.6.1, ≤ 11.6.5 | ≥ 12.1.0, ≤ 12.1.5
1 vendor · 14 products