6.9

CVE-2026-42780: f5 big-ip Path Traversal

CVSS: 6.9v4.0MediumAnalyzed
Published 13-05-2026Last modified 13-05-2026
Open JSON

Vulnerability summary

CVE-2026-42780 is a medium (CVSS 6.9) Path Traversal vulnerability in f5 big-ip. EPSS estimates a 1.23% chance of exploitation in the next 30 days, higher than 68.5% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.9/10
010
Medium · v4.0 (CVE.org)
EPSS score
1.23%
0%100%
Low · +0.34 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 13-05-2026
    PublishedVulnerability first disclosed.
  2. 13-05-2026
    Last modifiedVulnerability information updated.

Description

A directory traversal vulnerability exists in BIG-IP SSL Orchestrator that allows an authenticated attacker with high privilege to overwrite, delete or corrupt arbitrary local files.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

Probability

1.23%

Chance of exploitation in the next 30 days

Percentile

69%

Versus all other CVEs

30-day change

+0.34 pp

From 0.89% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.23%

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

F53 products
  • big-ip≥ 21.0.0, < 21.0.0.1 | ≥ 17.5.0, < 17.5.1.5 | ≥ 17.1.0, < 17.1.3.1 | ≥ 16.1.0 (No fix recorded)
  • big-ip_ssl_orchestrator≥ 17.1.0, ≤ 17.1.3 | ≥ 17.5.0, ≤ 17.5.1 | 21.0.0
  • ssl_orchestrator≥ 13.0, < 13.1.3 | ≥ 12.0, < 12.3.2 | ≥ 11.0, < 11.4.1

1 vendor · 3 products

References

1 links