CVE-2015-2558

Exploitation likely. EPSS gives it a 20% chance of exploitation in the next 30 days. A vendor fix is available.

CVSS 2.09.3Critical EPSS percentile97th20% chance in 30 days CISA KEVNot listedNo confirmed exploitation
No public exploit known FixVendor fixNo build named by the sources

Published 2015-10-14Updated 2026-05-06Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

The vendor has published a fix. Version details are below where the sources state them.

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

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."

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS97th

CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

20% chance of exploitation activity in the next 30 days, which ranks it in the 97th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

5 events over 3907 days, from the signal feeds we watch.

2026-06-25OpenVAS check added
2026-05-06Patch availablerecord updated
2015-10-14Publishedweakness classified

Affected products

Microsoft Corpcommercial · USaka microsoft, microsoft corporation
- excelDesktop AppConsumer Software / productivity
- excel for macDesktop AppOn-premConsumer Software / productivity
- excel viewerLibraryLibraryOSS Libraries / generic-library
- office compatibility packDesktop AppOn-premConsumer Software / productivity
- office sharepoint serverWeb AppOn-premEnterprise Software / itsm-monitoring
- sharepoint serverWeb AppOn-premEnterprise Software / collaboration-groupware
- Microsoft SharePoint ServerWeb AppOn-premEnterprise Software / collaboration-groupware
- Microsoft Office Compatibility Pack Service Pack 3Desktop AppOn-premConsumer Software / productivity

And 7 more affected products. See all after sign-in

Technical detail

CVSS 2.0 vector

Open in the CVSS calculator

AV:N/AC:M/Au:N/C:C/I:C/A:C

Scored 9.3 by NVD.

How it is reached

Access Vector NetworkExploitable remotely over the network
Access Complexity MediumSome conditions must be met
Authentication NoneNo authentication required

Impact if exploited

Confidentiality CompleteAll information is disclosed
Integrity CompleteAll data can be modified
Availability CompleteTotal shutdown of the affected resource

Weaknesses

NVD-CWE-OtherNo name in the record

Sources

References in the record

And 1 more reference. See all after sign-in

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