Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a malformed input…

Description

Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a malformed input document, which triggers a buffer overflow.

Scores

EPSS (exploitation in 30 days)

13.3% · top 3.6% of all CVEs (2 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: yes · Technical impact: total

Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Weakness

• n/a
• CWE-119 (opens in a new tab)

Affected products

• n/a

  • affected n/a

References (30)

• RHSA-2016:2824 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• https://www.tenable.com/security/tns-2016-20 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 1037705 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• 1036415 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• USN-2983-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• openSUSE-SU-2016:1523 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• http://support.eset.com/ca6333/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• 90729 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• USN-3044-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• [oss-security] 20160517 CVE-2016-0718: Expat XML Parser Crashes on Malformed Input (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• APPLE-SA-2016-07-18-1 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
• SUSE-SU-2016:1508 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• https://bugzilla.mozilla.org/show_bug.cgi?id=1236923 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 20170227 CVE-2016-9892 - Remote Code Execution as Root via ESET Endpoint Antivirus 6 (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
• GLSA-201701-21 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• https://source.android.com/security/bulletin/2016-11-01.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• DSA-3582 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• SUSE-SU-2016:1512 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• https://bugzilla.redhat.com/show_bug.cgi?id=1296102 (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://www.mozilla.org/security/announce/2016/mfsa2016-68.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• openSUSE-SU-2016:1964 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• RHSA-2018:2486 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• 1036348 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• https://support.apple.com/HT206903 (opens in a new tab)x_refsource_CONFIRMx_transferred
• openSUSE-SU-2016:1441 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• openSUSE-SU-2016:2026 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• http://packetstormsecurity.com/files/141350/ESET-Endpoint-Antivirus-6-Remote-Code-Execution.html (opens in a new tab)x_refsource_MISCx_transferred
• https://kc.mcafee.com/corporate/index?page=content&id=SB10365 (opens in a new tab)x_refsource_CONFIRMx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Record last updated 8 Oct 2026, 21:03 UTC.