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Critical severity9.8NVD Advisory· Published Feb 16, 2023· Updated Jun 17, 2026

CVE-2021-42756

CVE-2021-42756

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.

Affected products

3
  • Fortinet/Fortiweb3 versions
    cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*range: >=5.6.0,<6.0.8
    • (no CPE)range: <=6.4
    • (no CPE)range: 6.4.0

Patches

Vulnerability mechanics

References

1

News mentions

0

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