CVE-2020-21049
MediumPublic PoC
Published: 14 September 2021
Published
14 September 2021
Modified
24 April 2026
KEV Added
—
Patch
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CVSS Score v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS Score
0.0041
61.9th percentile
Risk Priority
13
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2020-21049 is a medium-severity Out-of-bounds Read (CWE-125) vulnerability in Saitoha Libsixel. Its CVSS base score is 6.5 (Medium).
Operationally, ranked in the top 38.1% 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
- 🇪🇺 ENISA EUVD: EUVD-2020-13828
Vulnerability details
An invalid read in the stb_image.h component of libsixel prior to v1.8.5 allows attackers to cause a denial of service (DOS) via a crafted PSD file.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
saitoha
libsixel
≤ 1.8.5
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.