7.5

CVE-2022-26517: f5 big-ip Incorrect Calculation

CVSS: 7.5v3.1HighModified
Published 05-05-2022Last modified 17-09-2024
Open JSON

Vulnerability summary

CVE-2022-26517 is a high (CVSS 7.5) Incorrect Calculation vulnerability in f5 big-ip. EPSS estimates a 0.82% chance of exploitation in the next 30 days, higher than 56.6% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.82%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 05-05-2022
    PublishedVulnerability first disclosed.
  2. 17-09-2024
    Last modifiedVulnerability information updated.

Description

On F5 BIG-IP 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6, and 13.1.x versions prior to 13.1.5, when the BIG-IP CGNAT Large Scale NAT (LSN) pool is configured on a virtual server and packet filtering is enabled, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.82%

Chance of exploitation in the next 30 days

Percentile

57%

Versus all other CVEs

30-day change

+0.01 pp

From 0.81% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.82%

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

F512 products
  • big-ip≥ 15.1.x, < 15.1.5.1 | ≥ 14.1.x, < 14.1.4.6 | ≥ 13.1.x, < 13.1.5
  • big-ip_access_policy_manager13.1.0 | 13.1.1 | 13.1.3 | 13.1.4 | 13.1.5 | 14.1.0 | 14.1.2 | 14.1.3 | 14.1.4 | 15.1.0 | 15.1.1 | 15.1.2 | 15.1.3 | 15.1.4 | 15.1.5 | 16.1.0 | 16.1.1 | 16.1.2
  • big-ip_advanced_firewall_manager13.1.0 | 13.1.1 | 13.1.3 | 13.1.4 | 13.1.5 | 14.1.0 | 14.1.2 | 14.1.3 | 14.1.4 | 15.1.0 | 15.1.1 | 15.1.2 | 15.1.3 | 15.1.4 | 15.1.5 | 16.1.0 | 16.1.1 | 16.1.2
  • big-ip_analytics13.1.0 | 13.1.1 | 13.1.3 | 13.1.4 | 13.1.5 | 14.1.0 | 14.1.2 | 14.1.3 | 14.1.4 | 15.1.0 | 15.1.1 | 15.1.2 | 15.1.3 | 15.1.4 | 15.1.5 | 16.1.0 | 16.1.1 | 16.1.2
  • big-ip_application_acceleration_manager13.1.0 | 13.1.1 | 13.1.3 | 13.1.4 | 13.1.5 | 14.1.0 | 14.1.2 | 14.1.3 | 14.1.4 | 15.1.0 | 15.1.1 | 15.1.2 | 15.1.3 | 15.1.4 | 15.1.5 | 16.1.0 | 16.1.1 | 16.1.2

1 vendor · 12 products

References

1 links