Vulnerability Intelligence Report
CVE-2021-42756
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.
No Active Exploit Signals
CVSS Base Score
9.3
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:36.41%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-121 ↗Execute unauthorized code or commands
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Fortinet | FortiWeb | 6.4.0 <= 6.4.1 (affected), 6.3.0 <= 6.3.16 (affected), 6.2.0 <= 6.2.6 (affected), 6.1.0 <= 6.1.2 (affected), 6.0.0 <= 6.0.7 (affected), 5.9.0 <= 5.9.1 (affected), 5.8.5 <= 5.8.7 (affected), 5.8.0 <= 5.8.3 (affected), 5.7.0 <= 5.7.3 (affected), 5.6.0 <= 5.6.2 (affected), 5.8.0 < 5.8.* (affected), 5.7.0 < 5.7.* (affected), 5.6.0 < 5.6.* (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
36.405%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Fortinet, Inc. · Vendor · USA |
| Reserved | 2021-10-20T17:44:45 |
| Published | 2023-02-16T18:05:39 |
| Last Updated | 2024-10-23T14:49:52 |
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