Medium [CVE-2025-53843] 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…
This medium-severity Fortinet advisory covers CVE-2025-53843 affecting FortiOS.
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Summary
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
- FortiOS 7.6: 7.6.0 through 7.6.3
- FortiOS 7.4: 7.4.0 through 7.4.8
- FortiOS 7.2: 7.2 all versions
- FortiOS 7.0: 7.0 all versions
- FortiOS 6.4: 6.4 all versions
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
- FortiOS 7.6: 7.6.4
- FortiOS 7.4: 7.4.9
- FortiOS 7.2: migrate to a fixed release
- FortiOS 7.0: migrate to a fixed release
- FortiOS 6.4: migrate to a fixed release
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
Mitigation checklist
- Upgrade per the Affected/Solution table: FortiOS 7.6: 7.6.4; FortiOS 7.4: 7.4.9; FortiOS 7.2: migrate to a fixed release; FortiOS 7.0: migrate to a fixed release; FortiOS 6.4: migrate to a fixed release.
- Warning :if auto-auth-extension-device is enable in config system interface, any devicecan be authorized and then the vulnerability can be exploited without administratorauthorization.Please note that auto-auth-extension-device is disabled by default
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
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