CVE-2012-2539

Name: CVE-2012-2539
Creator: NVD / NIST
Published: 2012-12-12T00:55:01.06+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 53.16%

Last modified Jun 16, 2026

CVE-2012-2539 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.". CISA has confirmed active exploitation in the wild. EPSS estimates a 53.16% chance of exploitation in the next 30 days.

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."

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

53.16%

98.8th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Apr 18, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Microsoft	Office Compatibility Pack	All versions	Sp2
Microsoft	Office Web Apps	2010	Sp1
Microsoft	Office Word Viewer	All versions	—
Microsoft	Sharepoint Server	2010	—
Microsoft	Word	2003	Sp3
Microsoft	Word	2007	Sp2
Microsoft	Word	2010	Sp1

References

https://www.us-cert.gov/cas/techalerts/TA12-346A.htmlThird Party Advisory, US Government Resource
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-079Patch, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16073Broken Link
https://www.us-cert.gov/cas/techalerts/TA12-346A.htmlThird Party Advisory, US Government Resource
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-079Patch, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16073Broken Link
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2012-2539US Government Resource

Timeline

Published: Dec 12, 2012
Last Modified: Jun 16, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2012-2539?

How severe is CVE-2012-2539?

CVE-2012-2539 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 53.16% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2012-2539?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST