CVE-2026-69639 PUBLISHED

Windows libarchive Remote Code Execution Vulnerability

Assigner: microsoft
Reserved: 03.08.2026 Published: 13.10.2026 Updated: 14.10.2026

Heap-based buffer overflow in Windows Libarchive allows an unauthorized attacker to execute code over a network.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS Score: 9.8

Product Status

Vendor Microsoft
Product Windows 10 Version 1809
Versions
  • affected from 10.0.17763.0 to 10.0.17763.9376 (excl.)
Vendor Microsoft
Product Windows 10 Version 21H2
Versions
  • affected from 10.0.19044.0 to 10.0.19044.7807 (excl.)
Vendor Microsoft
Product Windows 10 Version 22H2
Versions
  • affected from 10.0.19045.0 to 10.0.19044.7807 (excl.)
Vendor Microsoft
Product Windows 11 version 23H2
Versions
  • affected from 10.0.22631.0 to 10.0.22631.7652 (excl.)
Vendor Microsoft
Product Windows 11 Version 23H2
Versions
  • affected from 10.0.22631.0 to 10.0.22631.7652 (excl.)
Vendor Microsoft
Product Windows 11 Version 24H2
Versions
  • affected from 10.0.26100.0 to 10.0.26100.9711 (excl.)
Vendor Microsoft
Product Windows 11 Version 25H2
Versions
  • affected from 10.0.26200.0 to 10.0.26200.9711 (excl.)
Vendor Microsoft
Product Windows 11 version 26H1
Versions
  • affected from 10.0.28000.0 to 10.0.28000.3231 (excl.)
Vendor Microsoft
Product Windows 11 Version 26H2
Versions
  • affected from 10.0.26300.0 to 10.0.26300.9711 (excl.)
Vendor Microsoft
Product Windows Server 2019
Versions
  • affected from 10.0.17763.0 to 10.0.17763.9376 (excl.)
Vendor Microsoft
Product Windows Server 2019 (Server Core installation)
Versions
  • affected from 10.0.17763.0 to 10.0.17763.9376 (excl.)
Vendor Microsoft
Product Windows Server 2022
Versions
  • affected from 10.0.20348.0 to 10.0.20348.5761 (excl.)
Vendor Microsoft
Product Windows Server 2025
Versions
  • affected from 10.0.26100.0 to 10.0.26100.33650 (excl.)
Vendor Microsoft
Product Windows Server 2025 (Server Core installation)
Versions
  • affected from 10.0.26100.0 to 10.0.26100.33650 (excl.)

References

Problem Types