CVE-2026-69973

Windows libarchive Tampering Vulnerability

At a glance

Severity: MEDIUM 6.5
EPSS: EPSS 0.78 % · percentile 56 (2026-10-27)
State: PUBLISHED
Published: 2026-10-13
Updated: 2026-10-28
Assigner: microsoft
NVD status: Analyzed

Description

Improper limitation of a pathname to a restricted directory ('path traversal') in Windows Libarchive allows an unauthorized attacker to perform tampering over a network.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C	microsoft
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N	NVD · secure@microsoft.com (Secondary)

Weaknesses (CWE)

CWE-22

European references

ENISA EUVD · EUVD-2026-99126
GCVE · GCVE-0-2026-69973

CERT-FR advisories

CERTFR-2026-AVI-1314 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* < 10.0.17763.9376
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* < 10.0.17763.9376
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:* < 10.0.19044.7807
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:* < 10.0.19044.7807
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:* < 10.0.19044.7807
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:* < 10.0.19045.7807
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:* < 10.0.19045.7807
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:* < 10.0.19045.7807
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:* < 10.0.22631.7652
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:* < 10.0.22631.7652
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:* < 10.0.26100.9711
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:* < 10.0.26100.9711
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:* < 10.0.26200.9711
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:* < 10.0.26200.9711
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:* < 10.0.28000.3231
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:* < 10.0.28000.3231
cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:arm64:* < 10.0.26300.9711
cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:x64:* < 10.0.26300.9711
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* < 10.0.17763.9376
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:* < 10.0.20348.5761
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:* < 10.0.26100.33650

Affected products

Product	Versions
Microsoft · Windows 10 Version 1809	affected 10.0.17763.0 < 10.0.17763.9376
Microsoft · Windows 10 Version 21H2	affected 10.0.19044.0 < 10.0.19044.7807
Microsoft · Windows 10 Version 22H2	affected 10.0.19045.0 < 10.0.19045.7807
Microsoft · Windows 11 version 23H2	affected 10.0.22631.0 < 10.0.22631.7652
Microsoft · Windows 11 Version 23H2	affected 10.0.22631.0 < 10.0.22631.7652
Microsoft · Windows 11 Version 24H2	affected 10.0.26100.0 < 10.0.26100.9711
Microsoft · Windows 11 Version 25H2	affected 10.0.26200.0 < 10.0.26200.9711
Microsoft · Windows 11 version 26H1	affected 10.0.28000.0 < 10.0.28000.3231
Microsoft · Windows 11 Version 26H2	affected 10.0.26300.0 < 10.0.26300.9711
Microsoft · Windows Server 2019	affected 10.0.17763.0 < 10.0.17763.9376
Microsoft · Windows Server 2019 (Server Core installation)	affected 10.0.17763.0 < 10.0.17763.9376
Microsoft · Windows Server 2022	affected 10.0.20348.0 < 10.0.20348.5761
Microsoft · Windows Server 2025	affected 10.0.26100.0 < 10.0.26100.33650
Microsoft · Windows Server 2025 (Server Core installation)	affected 10.0.26100.0 < 10.0.26100.33650

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69973

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD