CVE-2026-39811
CVSSv3 Score: 4.4 An Integer Overflow or Wraparound vulnerability [CWE-190] in FortiWeb may allow a privileged authenticated attacker to perform a denial of service of the system via crafted HTTP requests. Revised on 2026-04-14 00:00:00
CSIRTS triage
- What
- An integer overflow vulnerability allows a privileged authenticated attacker to cause a denial of service.
- Who is affected
- Privileged users of FortiWeb.
- Urgency
- Remediation is important to prevent service disruption.
- Action
- Update FortiWeb to the latest version to mitigate the vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all EPSS-scored CVEs.
Advisory coverage (1)
- unknownInteger Overflow Denial of Service in administrative interfacefortinet · 2026-04-14
External references
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