Heap-based buffer overflow in Microsoft products - CVE-2026-58599
Published: September 9, 2026
Vulnerability identifier: #VU148108
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-58599
CWE-ID: CWE-122
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 a boundary error in HEVC Video Extensions. A remote attacker can pass specially crafted data to the application, trigger a heap-based buffer overflow 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-2026-58599
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