Is CVE-2020-36331 being actively exploited?

CVE-2020-36331 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2020-36331?

CVE-2020-36331 has a CVSS 3.1 base score of 9.1 (CRITICAL).

CVE-2020-36331

CRITICAL · CVSS 9.1EPSS 2.3%EU EUVD

A flaw was found in libwebp in versions before 1.0.1. An out-of-bounds read was found in function ChunkAssignData. The highest threat from this vulnerability is to data confidentiality and to the service availability.

Key facts

CVSS score: 9.1 (v3.1)
Severity: CRITICAL
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness (CWE): CWE-125
EPSS score: 2.3% (83th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2020-23868)
Published: May 21, 2021
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2020-23868 in the EU Vulnerability Database. Last updated in EUVD on August 4, 2024.

View on the EU Vulnerability Database

Affected products

apple / ipados
apple / iphone os
debian / debian linux
debian / debian linux
netapp / ontap select deploy administration utility
redhat / enterprise linux
webmproject / libwebp

Certified products that may be affected

25 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat, Inc. - FIPS 140 5513 - active
Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, LLC - FIPS 140 5461 - active
Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5089 - active
Strong Customer Authentication pour Apple Pay sur iPhone SE (de seconde génération) exécutant iOS 14.5.1 Version 18E212 - Apple Inc. - Common Criteria ANSSI-CC-2022/05 - active
Strong Customer Authentication pour Apple Pay sur iPhone (SoC A12 Bionic) exécutant iOS 14.5.1 Version 18E212 - Apple Inc. - Common Criteria ANSSI-CC-2022/04 - active

See all 25 in the Security Certifications Explorer.

References

http://seclists.org/fulldisclosure/2021/Jul/54(Mailing List, Third Party Advisory)
https://bugzilla.redhat.com/show_bug.cgi?id=1956856(Issue Tracking, Patch, Third Party Advisory)
https://lists.debian.org/debian-lts-announce/2021/06/msg00005.html(Mailing List, Third Party Advisory)
https://lists.debian.org/debian-lts-announce/2021/06/msg00006.html(Mailing List, Third Party Advisory)
https://security.netapp.com/advisory/ntap-20211112-0001/(Third Party Advisory)
https://support.apple.com/kb/HT212601(Third Party Advisory)
https://www.debian.org/security/2021/dsa-4930(Mailing List, Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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