CVE-2026-20837 — Heap-based Buffer Overflow in Microsoft Windows 10 Version 1809

CWE-122 — Heap-based Buffer Overflow5 documents5 sources
Severity
7.8HIGHNVD
EPSS
0.0%
top 87.85%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
17
Microsoft Windows 10 Version 1809Microsoft Windows 10 Version 21h2Microsoft Windows 10 Version 22h2+14 more
Timeline
PublishedJan 13

Description

Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code locally.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages17 packages

▶NVDmicrosoft/windows< 10.0.17763.8276+3
▶NVDmicrosoft/windows_10_1809< 10.0.17763.8276
▶NVDmicrosoft/windows_10_21h2< 10.0.19044.6809
▶NVDmicrosoft/windows_10_22h2< 10.0.19045.6809
▶NVDmicrosoft/windows_11_23h2< 10.0.22631.6491

🔴Vulnerability Details

2
CVEList
Windows Media Remote Code Execution Vulnerability↗2026-01-13
▶
GHSA
GHSA-5736-cvw5-ch2r: Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code locally↗2026-01-13
▶

📋Vendor Advisories

1
Microsoft
Windows Media Remote Code Execution Vulnerability↗2026-01-13
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-20837 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-20837 — Heap-based Buffer Overflow | cvebase