VulnerabilityModified

CVE-2015-2558

HIGH 9.3EPSS 23.0%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 23.0%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.

Description

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."

CVSS 2.0: 9.3 HIGHAV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS: 23.01% probability · 98th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Affected: microsoft/excel · microsoft/excel for mac · microsoft/excel viewer · microsoft/office compatibility pack · microsoft/office sharepoint server · microsoft/sharepoint server
Source: secure@microsoft.com

EPSS trend

EPSS moved from 23.0% on 12 October 2026 to 23.0% on 4 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

References

http://www.securitytracker.com/id/1033803Third Party Advisory, VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-516Third Party Advisory, VDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-110
http://www.securitytracker.com/id/1033803Third Party Advisory, VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-15-516Third Party Advisory, VDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-110

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.