CVE-2015-2558

Use-after-free vulnerability in Microsoft Excel 2007 SP3, Excel 2010 SP2, Excel 2013 SP1, Excel 2013 RT SP1, Excel 2016, Excel for Mac 2011, Excel 2016 for Mac, Excel Viewer, Office Compatibility Pack SP3, and Excel Services on SharePoint Server 2007 SP3, 2010 SP2, and 2013 SP1 allows remote attackers to execute arbitrary code via a long fileVersion element in an Office document, aka "Microsoft Office Memory Corruption Vulnerability."

Published: 2015-10-14 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-2558 is rated High Risk (66.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 43.03%, 97th 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-2015-2558

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 2025-12-28 48.81% 43.03% -5.78%
2 2025-12-27 43.03% 48.81% +5.78%
3 2025-12-15 — 43.03% —

Full EPSS history (23 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-2558

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-2015-2558

NVD evaluator notes for CVE-2015-2558

Comment: <a href="http://cwe.mitre.org/data/definitions/416.html">CWE-416: Use After Free</a>

Affected software / configurations for CVE-2015-2558

Vendor Product Version Raw CPE
microsoft excel 2007 cpe:2.3:a:microsoft:excel:2007:sp3:*:*:*:*:*:*
microsoft excel 2010 cpe:2.3:a:microsoft:excel:2010:sp2:*:*:*:*:x64:*
microsoft excel 2010 cpe:2.3:a:microsoft:excel:2010:sp2:*:*:*:*:x86:*
microsoft excel 2013 cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:*:*
microsoft excel 2013 cpe:2.3:a:microsoft:excel:2013:sp1:*:*:rt:*:*:*
microsoft excel 2016 cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:*:*
microsoft excel_for_mac 2011 cpe:2.3:a:microsoft:excel_for_mac:2011:*:*:*:*:*:*:*
microsoft excel_for_mac 2016 cpe:2.3:a:microsoft:excel_for_mac:2016:*:*:*:*:*:*:*
microsoft excel_viewer — cpe:2.3:a:microsoft:excel_viewer:*:*:*:*:*:*:*:*
microsoft office_compatibility_pack — cpe:2.3:a:microsoft:office_compatibility_pack:*:sp3:*:*:*:*:*:*
microsoft office_sharepoint_server 2007 cpe:2.3:a:microsoft:office_sharepoint_server:2007:sp3:x32:*:*:*:*:*
microsoft office_sharepoint_server 2007 cpe:2.3:a:microsoft:office_sharepoint_server:2007:sp3:x64:*:*:*:*:*
microsoft sharepoint_server 2010 cpe:2.3:a:microsoft:sharepoint_server:2010:sp2:*:*:*:*:*:*
microsoft sharepoint_server 2013 cpe:2.3:a:microsoft:sharepoint_server:2013:sp1:*:*:*:*:*:*

References for CVE-2015-2558

cvelogic Threat Intelligence