How severe is CVE-2013-1331?

CVE-2013-1331 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2013-1331 being actively exploited?

Yes. CVE-2013-1331 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-06-08, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2013-1331?

CVE-2013-1331 primarily affects Microsoft Office. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-1331?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2013-1331 have an EU (EUVD) identifier?

Yes. CVE-2013-1331 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2013-1371. It is also flagged as exploited in the EUVD (since 2022-06-08).

When was CVE-2013-1331 published?

CVE-2013-1331 was published on 2013-06-12 and last updated on 2026-06-16.

CVE-2013-1331

CVE-2013-1331 is a high-severity vulnerability in Microsoft Office with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-06-08). The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 9.3
EPSS exploit prediction: 82% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-06-08)
EU (EUVD) id: EUVD-2013-1371
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-06-08)
Weakness: CWE-120
Affected product: Microsoft Office
Published: 2013-06-12
Last modified: 2026-06-16

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."

Frequently asked questions

What is CVE-2013-1331?: 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."
How severe is CVE-2013-1331?: CVE-2013-1331 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2013-1331 being actively exploited?: Yes. CVE-2013-1331 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-06-08, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2013-1331?: CVE-2013-1331 primarily affects Microsoft Office. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-1331?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2013-1331 have an EU (EUVD) identifier?: Yes. CVE-2013-1331 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2013-1371. It is also flagged as exploited in the EUVD (since 2022-06-08).
When was CVE-2013-1331 published?: CVE-2013-1331 was published on 2013-06-12 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:microsoft:office:2003:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2011:*:*:*:*:macos:*:*

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