What’s Vulnerable › Vulnerabilities
CVE-2021-26109
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.9% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-12-08 · updated 2026-06-17
- Weakness: CWE-190
Description
An integer overflow or wraparound vulnerability in the memory allocator of SSLVPN in FortiOS before 7.0.1 may allow an unauthenticated attacker to corrupt control data on the heap via specifically crafted requests to SSLVPN, resulting in potentially arbitrary code execution.
Affected products
- Fortinet FortiOS (FortiGate): from 6.0.0 through 6.0.12; from 6.2.0 through 6.2.9; from 6.4.0 through 6.4.5; 7.0.0
References
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