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CVE-2020-36330

28
FAUCET Score

CVE-2020-36330 is an out-of-bounds read vulnerability in libwebp versions prior to 1.0.1, impacting products from Apple, Debian, NetApp, Red Hat, and webmproject. This critical vulnerability (CVSS 9.1) can be exploited remotely with low complexity, posing a significant risk to data confidentiality and service availability. While no public exploit code or active exploitation has been confirmed, it has garnered some community discussion and media coverage, including a mention in a Threatpost article regarding Apple updates.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.1CPE matchmatch criteria
cpe:2.3:a:webmproject:libwebp:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.23%
Probability of exploitation in next 30 days
EPSS Percentile
80.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0223 is in the 70th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

microsoftpatch availablevia msrc
Product: 16967-16820Fixed in: 1.0.3-1
microsoftpatch availablevia msrc
Product: cm1 libwebp 1.0.3-1 on CBL Mariner 1.0Fixed in: 1.0.3-1
redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: libwebp-0:1.0.0-5.el8
View patch

Vendor Advisories (2)

microsoft2021-May/CVE-2020-36330Critical

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

May 11, 2021
redhatCVE-2020-36330Moderate

libwebp: out-of-bounds read in ChunkVerifyAndAssign() in mux/muxread.c

Feb 25, 2020

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
seclists.org / fulldisclosure/2021/Jul/54
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2021/06/msg00005.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2021/06/msg00006.html
Mailing ListThird Party Advisory
security.netapp.com / advisory/ntap-20211104-0004
Third Party Advisory
support.apple.com / kb/HT212601
Not Applicable
debian.org / security/2021/dsa-4930
Third Party Advisory