VULNERABILITY INTELLIGENCE

CVE-2021-42756

CVSS score9.8 CRITICAL
EPSS probability35.22%
CISA KEVNot currently listed
Published2023-02-16
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions, 6.0.7 and below, 6.1.2 and below, 6.2.6 and below, 6.3.16 and below, 6.4 all versions may allow an unauthenticated remote attacker to achieve arbitrary code execution via specifically crafted HTTP requests.

Weakness classification

  • CWE-121: Stack-based Buffer Overflow
  • CWE-787: Out-of-bounds Write

Primary references