CVE-2021-42756

high-risk
Published 2023-02-16

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.

Do I need to act?

!
71.9% chance of exploitation in next 30 days
EPSS score — higher than 28% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Fortinet

References (2)

Vendor Advisory https://fortiguard.com/psirt/FG-IR-21-186
Vendor Advisory https://fortiguard.com/psirt/FG-IR-21-186
56
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 19/34 · Moderate
Exposure 5/34 · Minimal