6.6

CVE-2025-48839: fortinet fortiadc Out-of-bounds Write

CVSS: 6.6v3.1MediumAnalyzed
Published 18-11-2025Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2025-48839 is a medium (CVSS 6.6) Out-of-bounds Write vulnerability in fortinet fortiadc. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.9% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.6/10
010
Medium · v3.1 (NVD)
EPSS score
0.38%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 18-11-2025
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

Description

An Out-of-bounds Write vulnerability [CWE-787] in FortiADC 8.0.0, 7.6.0 through 7.6.2, 7.4.0 through 7.4.7, 7.2 all versions, 7.1 all versions, 7.0 all versions, 6.2 all versions may allow an authenticated attacker to execute arbitrary code via specially crafted HTTP requests.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

31%

Versus all other CVEs

30-day change

+0.03 pp

From 0.36% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.38%

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

Fortinet1 product
  • fortiadc≥ 7.6.0, ≤ 7.6.2 | ≥ 7.4.0, ≤ 7.4.7 | ≥ 7.2.0, ≤ 7.2.8 | ≥ 7.1.0, ≤ 7.1.5 | ≥ 7.0.0, ≤ 7.0.6 | ≥ 6.2.0, ≤ 6.2.6 | ≥ 6.2.0, < 7.4.8 | ≥ 7.6.0, < 7.6.3 | 8.0.0

1 vendor · 1 product

References

1 links