CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- Microsoft Office OLE DLL Side Loading Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
Description
Microsoft Visio 2007 SP3, Visio 2010 SP2, Visio 2013 SP1, Visio 2016, Visio Viewer 2007 SP3, and Visio Viewer 2010 mishandle library loading, which allows local users to gain privileges via a crafted application, aka "Microsoft Office OLE DLL Side Loading Vulnerability."
Affected products
microsoft: visio; microsoft: visio viewer
References10
- docs.microsoft.com/en-us/security-updates/securitybulletins/201… PatchVendor Advisory
- docs.microsoft.com/en-us/security-updates/securitybulletins/201… PatchVendor Advisory
- www.securify.nl/advisory/SFY20150804/microsoft_visio_multiple_d… ExploitThird Party Advisory
- www.securify.nl/advisory/SFY20150804/microsoft_visio_multiple_d… ExploitThird Party Advisory
- packetstormsecurity.com/files/137490/Microsoft-Visio-DLL-Hijack… Third Party AdvisoryVDB Entry
- seclists.org/fulldisclosure/2016/Jun/32 Broken LinkMailing ListThird Party Advisory
- www.securityfocus.com/archive/1/538685/100/0/threaded Broken LinkThird Party AdvisoryVDB Entry
- www.securitytracker.com/id/1036093 Broken LinkThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/137490/Microsoft-Visio-DLL-Hijack… Third Party AdvisoryVDB Entry
- seclists.org/fulldisclosure/2016/Jun/32 Broken LinkMailing ListThird Party Advisory
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 43% percentile: 99 · as of 8 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.