Is CVE-2012-2539 being actively exploited?

Yes. CVE-2012-2539 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on March 28, 2022.

What is the CVSS score for CVE-2012-2539?

CVE-2012-2539 has a CVSS 3.1 base score of 7.8 (HIGH).

CVE-2012-2539

HIGH · CVSS 7.8CISA KEV: actively exploitedEPSS 53.0%EU EUVD: exploited

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."

Key facts

CVSS score: 7.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
EPSS score: 53.0% (99th percentile)
In CISA KEV: Yes, added March 28, 2022
In EU EUVD: Yes (EUVD-2012-2525)
Published: December 12, 2012
NVD last modified: June 16, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Microsoft Word Remote Code Execution Vulnerability

Added to the KEV catalog on March 28, 2022; federal remediation due April 18, 2022.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2012-2525 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 22, 2025.

View on the EU Vulnerability Database

Affected products

microsoft / office compatibility pack
microsoft / office compatibility pack
microsoft / office web apps
microsoft / office word viewer
microsoft / sharepoint server
microsoft / word
microsoft / word
microsoft / word
microsoft / word

References

http://www.us-cert.gov/cas/techalerts/TA12-346A.html(Third Party Advisory, US Government Resource)
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-079(Patch, Vendor Advisory)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16073(Broken Link)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2012-2539(US Government Resource)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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