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CVE-2021-42756

Severity
CRITICAL
CVSS
9.3
EPSS
0.34978
Risk score
49.44
CISA KEV
No
PoC
No
Published
2023-02-16
Modified
2024-10-23
First seen
2026-08-07
Aliases
EUVD-2021-29714, GHSA-WQMG-F43P-5CCF
Products
Fortinet:FortiWeb 5.6.0 <5.6.*, Fortinet:FortiWeb 5.6.0 ≤5.6.2, Fortinet:FortiWeb 5.7.0 <5.7.*, Fortinet:FortiWeb 5.7.0 ≤5.7.3, Fortinet:FortiWeb 5.8.0 <5.8.*, Fortinet:FortiWeb 5.8.0 ≤5.8.3, Fortinet:FortiWeb 5.8.5 ≤5.8.7, Fortinet:FortiWeb 5.9.0 ≤5.9.1, Fortinet:FortiWeb 6.0.0 ≤6.0.7, Fortinet:FortiWeb 6.1.0 ≤6.1.2, Fortinet:FortiWeb 6.2.0 ≤6.2.6, Fortinet:FortiWeb 6.3.0 ≤6.3.16, Fortinet:FortiWeb 6.4.0 ≤6.4.1
Sources
euvd EUVD-2021-29714

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.

References