What is CVE-2025-58903?
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.
The record classifies CVE-2025-58903 under weakness class CWE-252. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs high-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 388 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 2.5 — LOW
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C - EPSS (FIRST)
- 0.6% probability of exploitation in the next 30 days, higher than 48.2% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 3.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2025-10-14, last modified 2026-08-11
Is CVE-2025-58903 being exploited?
It currently carries a trending score of 17 in the Threadlinqs vulnerability feed.
Affected products and versions
- Fortinet: FortiOS
How to fix CVE-2025-58903
No vendor patch reference has been recorded for CVE-2025-58903 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2025-58903
1 tracked threat in the Threadlinqs corpus references CVE-2025-58903, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on .