How severe is CVE-2012-2539?

CVE-2012-2539 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-2012-2539 being actively exploited?

Yes. CVE-2012-2539 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-28, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2012-2539?

CVE-2012-2539 primarily affects Microsoft Office Compatibility Pack. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-2539?

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-2012-2539 have an EU (EUVD) identifier?

Yes. CVE-2012-2539 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2012-2525. It is also flagged as exploited in the EUVD (since 2022-03-28).

When was CVE-2012-2539 published?

CVE-2012-2539 was published on 2012-12-12 and last updated on 2026-06-16.

CVE-2012-2539

CVE-2012-2539 is a high-severity vulnerability in Microsoft Office Compatibility Pack 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 2022-03-28). The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 9.3
EPSS exploit prediction: 53% (99th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-03-28)
EU (EUVD) id: EUVD-2012-2525
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-03-28)
Weakness: CWE-787
Affected product: Microsoft Office Compatibility Pack
Published: 2012-12-12
Last modified: 2026-06-16

Description

Microsoft Word 2003 SP3, 2007 SP2 and SP3, and 2010 SP1; Word Viewer; Office Compatibility Pack SP2 and SP3; and Office Web Apps 2010 SP1 allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted RTF data, aka "Word RTF 'listoverridecount' Remote Code Execution Vulnerability."

Frequently asked questions

What is CVE-2012-2539?: Microsoft Word 2003 SP3, 2007 SP2 and SP3, and 2010 SP1; Word Viewer; Office Compatibility Pack SP2 and SP3; and Office Web Apps 2010 SP1 allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted RTF data, aka "Word RTF 'listoverridecount' Remote Code Execution Vulnerability."
How severe is CVE-2012-2539?: CVE-2012-2539 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-2012-2539 being actively exploited?: Yes. CVE-2012-2539 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-28, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2012-2539?: CVE-2012-2539 primarily affects Microsoft Office Compatibility Pack. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-2539?: 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-2012-2539 have an EU (EUVD) identifier?: Yes. CVE-2012-2539 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2012-2525. It is also flagged as exploited in the EUVD (since 2022-03-28).
When was CVE-2012-2539 published?: CVE-2012-2539 was published on 2012-12-12 and last updated on 2026-06-16.

References

Affected products (9)

cpe:2.3:a:microsoft:office_compatibility_pack:-:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_compatibility_pack:-:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_web_apps:2010:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_word_viewer:-:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2010:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:word:2003:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:word:2007:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:word:2007:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:word:2010:sp1:*:*:*:*:*:*

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