CVE-2025-53843

CVSS 6.9 MEDIUMEPSS 0.6%CWE-121

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.9EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

18 Nov 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

A stack-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions allows attacker to execute unauthorized code or commands via specially crafted packets

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:C

Affected products

Fortinet · FortiOS

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References

https://cert-portal.siemens.com/productcert/html/ssa-864900.html https://fortiguard.fortinet.com/psirt/FG-IR-25-358