A remote code execution vulnerability exists in "Microsoft COM for Windows" when it fails to properly handle serialized objects, aka "Micro…

published 2018-08-15 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-20000

cvss: 8.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 23.4%; EPSS 23.4% chance of exploitation in 30 days, percentile 97%
public exploits: 0; none known

A remote code execution vulnerability exists in "Microsoft COM for Windows" when it fails to properly handle serialized objects, aka "Microsoft COM for Windows Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

Exploit prediction

23.40% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.0	8.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	9.3	AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

Microsoft Windows 7
Microsoft Windows Server 2012 R2
Microsoft Windows RT 8.1
Microsoft Windows Server 2008
Microsoft Windows Server 2012
Microsoft Windows 8.1
Microsoft Windows Server 2016
Microsoft Windows Server 2008 R2
Microsoft Windows 10
Microsoft Windows 10 Servers

Classification

Weakness

CWE-502 Deserialization of Untrusted Data

References

portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2018-8349
vendor-advisory
securityfocus.com /bid/104984
vdb-entry, third-party-advisory
securitytracker.com /id/1041466
vdb-entry, third-party-advisory

Sources

CVE List CVE-2018-8349
NVD CVE-2018-8349

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary