Cyber Resilience

CVE-2021-23180

HighPublic PoC

Published: 02 March 2022

Published
02 March 2022
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.0028 51.6th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-23180 is a high-severity NULL Pointer Dereference (CWE-476) vulnerability in Htmldoc Project Htmldoc. Its CVSS base score is 7.8 (High).

Operationally, ranked in the top 48.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

A flaw was found in htmldoc in v1.9.12 and before. Null pointer dereference in file_extension(),in file.c may lead to execute arbitrary code and denial of service.

CWE(s)
CWE-476

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

htmldoc project
htmldoc
≤ 1.9.12

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References