ExploitedIn CISA KEVFix available

CVE-2013-1331

Exploitation confirmed. First attested on 2022-06-08 by CISA-ADP, CISA KEV, GCVE · kevintel.

Published2013-06-12
WeaknessCWE-120

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

Buffer overflow in Microsoft Office 2003 SP3 and Office 2011 for Mac allows remote attackers to execute arbitrary code via crafted PNG data in an Office document, leading to improper memory allocation, aka "Office Buffer Overflow Vulnerability."

Timeline

dates in UTC

2013-06-1203:29CVE publishedNVD
2022-06-08Added to the CISA KEV catalogCISA KEV
2022-06-08Listed as exploited by GCVEGCVE
2022-06-08Exploitation first reportedCISA KEV
2025-02-1018:43SSVC 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-2013-1331?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2013-1331?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Microsoft office

Branch	Affected	Fixed in	Source
2003.x	= 2003	no fix published	NVD
2011.x	= 2011	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 2022-06-22

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: 2022-06-08
Patch Due Date: 2022-06-22
Ransomware Use: Unknown
Required Action: Apply updates per vendor instructions.

Sources

CISA KEVKEV entry2022-06-08
GCVEexploitation2022-06-08
CISA-ADPSSVC decisionactive2025-02-10
OpenCVESSVC decisionactive—
CISA-ADPCVSS 3.17.82025-02-10
NVDCVSS 3.17.8read 2026-10-23
NVDCVSS 2.09.3read 2026-10-23
CISA-ADPweakness (CWE)CWE-1202025-02-10
NVDweakness (CWE)CWE-120read 2026-10-23
FIRST EPSSEPSS score79.8 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2013-06-12
Last Modified: 2026-06-16
NVD status: Analyzed

Frequently asked questions

What is CVE-2013-1331?

Is CVE-2013-1331 actively exploited?

Yes. CVE-2013-1331 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 2022-06-22.

What is the CVSS score for CVE-2013-1331?

CVE-2013-1331 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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