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CVE-2011-0216

33
FAUCET Score

CVE-2011-0216 describes an off-by-one error in libxml within Apple Safari versions prior to 5.0.6, affecting Apple and Microsoft Windows operating systems. This vulnerability carries a critical CVSS score of 9.3, indicating a high-severity risk where remote attackers can execute arbitrary code or cause a denial of service through a heap-based buffer overflow by enticing users to a crafted website. Despite its high severity, there is no evidence of active exploitation, publicly available exploit code in Metasploit or ExploitDB, nor significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.0.5CPE matchmatch criteria
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:apple:safari:1.0:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:apple:safari:1.0:beta:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:apple:safari:1.0:beta2:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:apple:safari:1.0.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
5.31%
Probability of exploitation in next 30 days
EPSS Percentile
91.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0531 is in the 61st percentile among its peer group of 8,918 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: libxml2-0:2.6.16-12.9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libxml2-0:2.6.26-2.1.12.el5_7.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libxml2-0:2.7.6-4.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: mingw32-libxml2-0:2.7.6-6.el6_3
View patch
applevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2011-0216Low

libxml2: Off-by-one error leading to heap-based buffer overflow in encoding

Jul 20, 2011

References

lists.apple.com / archives/security-announce/2011//Jul/msg00002.html
PatchVendor Advisory
lists.apple.com / archives/Security-announce/2011//Oct/msg00001.html
lists.apple.com / archives/Security-announce/2011//Oct/msg00002.html
rhn.redhat.com / errata/RHSA-2013-0217.html
support.apple.com / kb/HT4808
Vendor Advisory
support.apple.com / kb/HT4999
support.apple.com / kb/HT5001
debian.org / security/2012/dsa-2394
mandriva.com / security/advisories
redhat.com / support/errata/RHSA-2011-1749.html