9.8

CVE-2021-22992: f5 big-ip_access_policy_manager Classic Buffer Overflow

CVSS: 9.8v3.1CriticalModified
Published 31-03-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-22992 is a critical (CVSS 9.8) Classic Buffer Overflow vulnerability in f5 big-ip_access_policy_manager. EPSS estimates a 72.71% chance of exploitation in the next 30 days, higher than 99.4% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
72.71%
0%100%
Critical · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 31-03-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, 12.1.x before 12.1.5.3, and 11.6.x before 11.6.5.3, a malicious HTTP response to an Advanced WAF/BIG-IP ASM virtual server with Login Page configured in its policy may trigger a buffer overflow, resulting in a DoS attack. In certain situations, it may allow remote code execution (RCE), leading to complete system compromise. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

72.71%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

0.00 pp

From 72.71% on 19-09-2026

19-09-202619-10-2026
EPSS score
72.71%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

F514 products
  • big-ip_access_policy_manager≥ 11.6.1, < 11.6.5.3 | ≥ 12.1.0, < 12.1.5.3 | ≥ 13.1.0, < 13.1.3.6 | ≥ 14.1.0, < 14.1.4 | ≥ 15.1.0, < 15.1.2.1 | ≥ 16.0.0, < 16.0.1.1
  • big-ip_advanced_firewall_manager≥ 11.6.1, < 11.6.5.3 | ≥ 12.1.0, < 12.1.5.3 | ≥ 13.1.0, < 13.1.3.6 | ≥ 14.1.0, < 14.1.4 | ≥ 15.1.0, < 15.1.2.1 | ≥ 16.0.0, < 16.0.1.1
  • big-ip_advanced_web_application_firewall≥ 11.6.1, < 11.6.5.3 | ≥ 12.1.0, < 12.1.5.3 | ≥ 13.1.0, < 13.1.3.6 | ≥ 14.1.0, < 14.1.4 | ≥ 15.1.0, < 15.1.2.1 | ≥ 16.0.0, < 16.0.1.1
  • big-ip_analytics≥ 11.6.1, < 11.6.5.3 | ≥ 12.1.0, < 12.1.5.3 | ≥ 13.1.0, < 13.1.3.6 | ≥ 14.1.0, < 14.1.4 | ≥ 15.1.0, < 15.1.2.1 | ≥ 16.0.0, < 16.0.1.1
  • big-ip_application_acceleration_manager≥ 11.6.1, < 11.6.5.3 | ≥ 12.1.0, < 12.1.5.3 | ≥ 13.1.0, < 13.1.3.6 | ≥ 14.1.0, < 14.1.4 | ≥ 15.1.0, < 15.1.2.1 | ≥ 16.0.0, < 16.0.1.1

1 vendor · 14 products

References

1 links