CVE-2025-21246 — Heap-based Buffer Overflow in Microsoft Windows 10 Version 1507

CWE-122 — Heap-based Buffer OverflowCWE-125 — Out-of-bounds ReadCWE-1341 — Multiple Releases of Same Resource or Handle8 documents8 sources
Severity
8.8HIGHNVD
OSV7.8
EPSS
0.7%
top 28.69%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
28
Microsoft Windows 10 Version 1507Microsoft Windows 10 Version 1607Microsoft Windows 10 Version 1809+25 more
Timeline
PublishedJan 14
Latest updateJan 13

Description

Windows Telephony Service Remote Code Execution Vulnerability

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages27 packages

▶CVEListV5microsoft/windows_server_2008_service_pack_26.0.6003.0 — 6.0.6003.23070
▶CVEListV5microsoft/windows_server_2008_r2_service_pack_16.1.7601.0 — 6.1.7601.27520
▶NVDmicrosoft/windows< 10.0.14393.7699+5
▶NVDmicrosoft/windows_10_1507< 10.0.10240.20890
▶NVDmicrosoft/windows_10_1607< 10.0.14393.7699

Patches

Patch: msrc.microsoft.com ↗

🔴Vulnerability Details

3
OSV
team: fix check for port enabled in team_queue_override_port_prio_changed()↗2026-01-13
▶
CVEList
Windows Telephony Service Remote Code Execution Vulnerability↗2025-01-14
▶
GHSA
GHSA-c735-gp9w-6hcw: Windows Telephony Service Remote Code Execution Vulnerability↗2025-01-14
▶

📋Vendor Advisories

1
Microsoft
Windows Telephony Service Remote Code Execution Vulnerability↗2025-01-14
▶

🕵️Threat Intelligence

1
Bleepingcomputer
Microsoft January 2025 Patch Tuesday fixes 8 zero-days, 159 flaws↗2025-01-14
▶
CVE-2025-21246 — Heap-based Buffer Overflow | cvebase