CVE-2026-59837
CVSSv3 Score: 5.9 A Stack-based Buffer Overflow vulnerability [CWE-121] in FortiOS, FortiProxy and FortiPAM may allow a privileged authenticated attacker who can bypass stack protection and ASLR to execute arbitrary code or commands via crafted HTTP requests. Revised on 2026-07-14 00:00:00
CSIRTS triage
- What
- A privileged authenticated attacker may execute arbitrary code or commands via crafted HTTP requests.
- Who is affected
- Privileged authenticated users of FortiOS, FortiProxy, and FortiPAM.
- Urgency
- Remediation is urgent due to the potential for remote code execution.
- Action
- Update to the latest versions of FortiOS, FortiProxy, and FortiPAM.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.58% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all EPSS-scored CVEs.
Advisory coverage (4)
- medium[NEW] [medium] Fortinet FortiOS and FortiProxy: Multiple vulnerabilitiescert-bund · 2026-07-15
- unknownMultiple vulnerabilities in Fortinet products (July 15, 2026)cert-fr-avis · 2026-07-15
- mediumCVE-2026-59837: A stack-based buffer overflow vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7…nvd · 2026-07-14
- unknownStack Buffer Overflow in Log Reportfortinet · 2026-07-14
External references
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