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CVE-2012-2539· NVD / CVE Program· CNA microsoft

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 al

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."

HighCVSS 7.8 · v3.1KEVWeaponized No fix recorded
Published
Dec 11, 2012
Updated
Jun 16, 2026
EPSS
53.0% · 99th percentile
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Action score

77

This week

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CVSS
31 / 40 · 7.8 / 10
CISA KEV
30 / 30 · Listed
EPSS
16 / 30 · 53.0%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Mar 28, 2022. That signals real attacks, not theory.

Remediation deadline for government agencies: Apr 18, 2022.

Affected systems

VendorProduct
microsoftoffice compatibility pack
microsoftoffice web apps
microsoftoffice word viewer
microsoftsharepoint server
microsoftword

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft office compatibility packall versions
  • microsoft office web apps2010
  • microsoft office word viewerall versions
  • microsoft sharepoint server2010
  • microsoft word2003
  • microsoft word2007
  • microsoft word2010

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-11826Microsoft Office 2010, SharePoint Enterprise Server 2010, SharePoint Server 2010, Web Applications, Office Web Apps Server 2010 and 2013, WoKEV
    85Now
  • CVE-2014-2778Microsoft Word 2007 SP3 and Office Compatibility Pack SP3 allow remote attackers to execute arbitrary code or cause a denial of service (mem
    43Plan
  • CVE-2013-3892Microsoft Word 2007 SP3 and Office Compatibility Pack SP3 allow remote attackers to execute arbitrary code via a crafted Office document, ak
    43Plan
  • CVE-2013-3858Microsoft Word Automation Services in SharePoint Server 2010 SP1, Word Web App 2010 SP1 in Office Web Apps 2010, Word 2003 SP3, Word 2007 SP
    43Plan
  • CVE-2013-3855Microsoft Word 2003 SP3 and 2007 SP3, Office Compatibility Pack SP3, and Word Viewer allow remote attackers to execute arbitrary code or cau
    43Plan
  • CVE-2013-3852Microsoft Word 2003 SP3, 2007 SP3, and 2010 SP1; Office Compatibility Pack SP3; and Word Viewer allow remote attackers to execute arbitrary
    43Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. CISA KEV+3393 d
  3. TodaySep 30, 2026+5041 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records