Home/CVE/Microsoft Word Remote Code Execution Vulnerability
CVE

CVE-2012-2539

Microsoft Word Remote Code Execution Vulnerability

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.".

HIGH · CVSS 7.8 ⚠ CISA KEV EPSS 0.84414
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 1% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

⬡

Weakness Classification

CWE-787Out-of-bounds Write
CWE-787Out-of-bounds Write
▤

Affected Products & Versions

5
microsoft office compatibility packall versions
microsoft office web appsall versions
microsoft office word viewerall versions
microsoft sharepoint serverall versions
microsoft wordall versions
◈

Detection Rules (IDS/IPS)

1
et-openET WEB_CLIENT Microsoft Rich Text File .RTF File download with invalid listoverridecountattempted-user
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Dec 2012 · 12:55 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
cisaKEV-CVE-2012-2539
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.us-cert.gov/cas/techalerts/TA12-346A.htmlThird Party AdvisoryUS Government Resource
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-079PatchVendor 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
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