Is CVE-2010-4577 being actively exploited?

CVE-2010-4577 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2010-4577?

CVE-2010-4577 has a CVSS 3.1 base score of 7.5 (HIGH).

CVE-2010-4577

HIGH · CVSS 7.5EPSS 2.2%EU EUVD

The CSSParser::parseFontFaceSrc function in WebCore/css/CSSParser.cpp in WebKit, as used in Google Chrome before 8.0.552.224, Chrome OS before 8.0.552.343, webkitgtk before 1.2.6, and other products does not properly parse Cascading Style Sheets (CSS) token sequences, which allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted local font, related to "Type Confusion."

Key facts

CVSS score: 7.5 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-125
EPSS score: 2.2% (83th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2010-4543)
Published: December 22, 2010
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2010-4543 in the EU Vulnerability Database. Last updated in EUVD on January 21, 2025.

View on the EU Vulnerability Database

Affected products

debian / debian linux
debian / debian linux
fedoraproject / fedora
google / chrome
google / chrome os
webkitgtk / webkitgtk

References

http://code.google.com/p/chromium/issues/detail?id=63866(Exploit, Issue Tracking, Mailing List)
http://googlechromereleases.blogspot.com/2010/12/stable-beta-channel-updates_13.html(Release Notes)
http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052906.html(Mailing List, Third Party Advisory)
http://secunia.com/advisories/42648(Broken Link, Third Party Advisory)
http://secunia.com/advisories/43086(Broken Link, Third Party Advisory)
http://trac.webkit.org/changeset/72685(Mailing List, Patch)
http://trac.webkit.org/changeset/72685/trunk/WebCore/css/CSSParser.cpp(Mailing List, Patch)
http://www.debian.org/security/2011/dsa-2188(Mailing List, Third Party Advisory)
http://www.gentoo.org/security/en/glsa/glsa-201012-01.xml(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2011-0177.html(Broken Link, Third Party Advisory)
http://www.securityfocus.com/bid/45722(Broken Link, Third Party Advisory, VDB Entry)
http://www.vupen.com/english/advisories/2011/0216(Broken Link, Third Party Advisory)
https://bugs.webkit.org/show_bug.cgi?id=49883(Permissions Required)
https://bugzilla.redhat.com/show_bug.cgi?id=667025(Issue Tracking, Third Party Advisory)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13953(Broken Link, Third Party Advisory)

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

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