4.9

CVE-2025-58903: fortinet fortios Unchecked Return Value

CVSS: 4.9v3.1MediumModified
Published 14-10-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2025-58903 is a medium (CVSS 4.9) Unchecked Return Value vulnerability in fortinet fortios. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 49.1% of scored vulnerabilities.

Overall risk
20/100
0100
Low · default modelHow is this calculated?
CVSS score
4.9/10
010
Medium · v3.1 (NVD)
EPSS score
0.62%
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. 14-10-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

An Unchecked Return Value vulnerability [CWE-252] in Fortinet FortiOS version 7.6.0 through 7.6.3 and before 7.4.8 API allows an authenticated user to cause a Null Pointer Dereference, crashing the http daemon via a specialy crafted request.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.62%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

+0.01 pp

From 0.62% on 22-09-2026

22-09-202622-10-2026
EPSS score
0.62%

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
  • fortios≥ 6.4.0, < 7.4.9 | ≥ 7.6.0, < 7.6.4 | ≥ 7.6.0, ≤ 7.6.3 | ≥ 7.4.0, ≤ 7.4.8 | ≥ 7.2.0, ≤ 7.2.12 | ≥ 7.0.0, ≤ 7.0.18 | ≥ 6.4.0, ≤ 6.4.16

1 vendor · 1 product

References

2 links