Vulnerability · 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 Derefere
Published Oct 14, 2025 · catalog updated Oct 15, 2026 · Fortinet FortiOS
Last checked Oct 23, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-58903. EPSS is 0.62%. Act only if a listed version of Fortinet FortiOS is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2026-84392 · Low
- CVE-2026-84393 · High
- CVE-2026-71407 · High
- CVE-2026-71408 · Medium
- CVE-2026-59840 · Medium
- Severity
- Low2.5
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.62%
- Remediation
- Vendor / distro source
- Affected products
- vendor Fortinet FortiOS 7.0.0 ≤7.0.18
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Fortinet FortiOS 7.0.0 ≤7.0.187.0.0 ≤7.0.18
How to fix CVE-2025-58903
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
Seen in 7.0.0 ≤7.0.18
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-58903. EPSS is 0.62%. Act only if a listed version of Fortinet FortiOS is installed.
Which versions are affected?
Compare what you have installed with Fortinet FortiOS 7.0.0 ≤7.0.18 7.0.0 ≤7.0.18. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.62%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Oct 14, 2025 · EUVD
Detected
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.
Oct 15, 2026 · EUVD
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2025-58903
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-58903
30-day exploitation probability 0.62%
first.org - EUVDVulnerability recordEUVD-2025-34248
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.
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 23, 2026
- CVE.orgOct 22, 2026
- EUVDOct 22, 2026