ExploitedIn CISA KEVFix available

CVE-2013-7331

Exploitation confirmed. First attested on 2022-05-25 by CISA-ADP, CISA KEV, GCVE · kevintel.

Published2014-02-26
WeaknessCWE-209

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2014-02-2614:55CVE publishedNVD
2022-05-25Added to the CISA KEV catalogCISA KEV
2022-05-25Listed as exploited by GCVEGCVE
2022-05-25Exploitation first reportedCISA KEV
2025-02-1020:10SSVC exploitation set to activeCISA-ADP
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2013-7331?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2013-7331?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Microsoft internet explorerversion to verify

Branch	Affected	Fixed in	Source
6.x	= 6	no fix published	NVD
7.x	= 7	no fix published	NVD
8.x	= 8	no fix published	NVD
9.x	= 9	no fix published	NVD
10.x	= 10	no fix published	NVD
11.x	= 11	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

CISA’s required action: Apply updates per vendor instructions.due 2022-06-15

Advisories and patches

docs.microsoft.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

CISA Known Exploited Vulnerability

Date Added: 2022-05-25
Patch Due Date: 2022-06-15
Ransomware Use: Unknown
Required Action: Apply updates per vendor instructions.

Sources

CISA KEVKEV entry2022-05-25
GCVEexploitation2022-05-25
CISA-ADPSSVC decisionactive2025-02-10
OpenCVESSVC decisionactive—
CISA-ADPCVSS 3.16.52025-02-10
NVDCVSS 2.04.3read 2026-10-23
CISA-ADPweakness (CWE)CWE-2092025-02-10
NVDweakness (CWE)CWE-209read 2026-10-23
FIRST EPSSEPSS score50.2 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Published: 2014-02-26
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2013-7331?

Is CVE-2013-7331 actively exploited?

Yes. CVE-2013-7331 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-06-15.

What is the CVSS score for CVE-2013-7331?

CVE-2013-7331 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.

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