What is CVE-2013-7331?

CVE-2013-7331 is a medium-severity vulnerability in Microsoft Internet Explorer, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 6.5/10. Published 2014-02-26.

How severe is CVE-2013-7331?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2013-7331 known to be exploited?

Yes. CVE-2013-7331 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-25), indicating it is being actively exploited. 6 public proof-of-concept repositories are indexed.

Information disclosure in Microsoft Internet Explorer

CVE-2013-7331

The Microsoft.XMLDOM ActiveX control in Microsoft Windows 8.1 and earlier allows remote attackers to determine the existence of local pathnames, UNC share pathnames, intranet hostnames, and intranet IP addresses by examining error codes, as demonstrated by a res:// URL, and exploited in the wild in February 2014.

Published 2014-02-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.

EPSS exploit prediction

EPSS: 0.502 (98.9th percentile), scored 2026-10-19.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 98.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.579 · newest: 0.502 · change: -0.077

Affected products

Microsoft Internet Explorer — versions 6, 7, 8
Microsoft Windows 7
Microsoft Windows 8
Microsoft Windows 8.1
Microsoft Windows Rt
Microsoft Windows Rt 8.1
Microsoft Windows Server 2003
Microsoft Windows Server 2008 — versions r2
Microsoft Windows Server 2012 — versions r2
Microsoft Windows Vista

Weakness classification (CWE)

CWE-209 — Generation of Error Message Containing Sensitive Information

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-05-25. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-06-15.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

soroush.secproject.com/blog/2013/04/microsoft-xmldom-in-ie-can-divulge-informat… (Exploit)
www.securitytracker.com/id/1030818 (VDB Entry, Third Party Advisory, vdb-entry)
docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-052 (vendor-advisory, Patch, Vendor Advisory)
www.kb.cert.org/vuls/id/539289 (US Government Resource, Third Party Advisory, third-party-advisory)
www.fireeye.com/blog/uncategorized/2014/02/operation-snowman-deputydog-actor-co… (Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2013-7331?: CVE-2013-7331 is a medium-severity vulnerability in Microsoft Internet Explorer, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 6.5/10. Published 2014-02-26.
How severe is CVE-2013-7331?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2013-7331 known to be exploited?: Yes. CVE-2013-7331 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-25), indicating it is being actively exploited. 6 public proof-of-concept repositories are indexed.