Integer underflow in Microsoft products - CVE-2026-108400
Published: October 13, 2026
Vulnerability identifier: #VU154437
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-108400
CWE-ID: CWE-191
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer underflow in HEVC Video Extensions. A remote attacker can trick a victim to open a specially crafted file, trigger integer underflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
HEVC Video Extensions for Licensed Applications
HEVC Video Extensions from Device Manufacturer
HEVC Video Extensions
HEVC Video Extensions from Device Manufacturer
HEVC Video Extensions
How to mitigate CVE-2026-108400
Install updates from vendor's website.
HEVC Video Extensions for Licensed Applications - update to 2.4.85.0
HEVC Video Extensions from Device Manufacturer - addressed in versions 2.4.86.0, 2.5.25.0
HEVC Video Extensions - update to 2.4.87.0
HEVC Video Extensions from Device Manufacturer - addressed in versions 2.4.86.0, 2.5.25.0
HEVC Video Extensions - update to 2.4.87.0