CVE-2011-1983

Use-after-free vulnerability in Microsoft Office 2007 SP2 and SP3, Office 2010 Gold and SP1, and Office for Mac 2011 allows remote attackers to execute arbitrary code via a crafted Word document, aka "Word Use After Free Vulnerability."

Published: 2011-12-14 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1983 is rated High Risk (68.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 54.75%, 98th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-1983

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-10-18 57.96% 54.75% -3.21%
2 2025-07-01 60.56% 57.96% -2.60%
3 2025-03-30 — 60.56% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1983

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2011-1983

Affected software / configurations for CVE-2011-1983

Vendor Product Version Raw CPE
microsoft office 2007 cpe:2.3:a:microsoft:office:2007:sp2:*:*:*:*:*:*
microsoft office 2007 cpe:2.3:a:microsoft:office:2007:sp3:*:*:*:*:*:*
microsoft office 2010 cpe:2.3:a:microsoft:office:2010:*:x32:*:*:*:*:*
microsoft office 2010 cpe:2.3:a:microsoft:office:2010:*:x64:*:*:*:*:*
microsoft office 2010 cpe:2.3:a:microsoft:office:2010:sp1:x32:*:*:*:*:*
microsoft office 2010 cpe:2.3:a:microsoft:office:2010:sp1:x64:*:*:*:*:*
microsoft office 2011 cpe:2.3:a:microsoft:office:2011:*:mac:*:*:*:*:*

References for CVE-2011-1983

cvelogic Threat Intelligence