CVE-2026-70005
mediumWeak authentication in Active Directory Federation Services (AD FS) allows an unauthorized attacker to bypass a security feature over a network.
Vendor / product: Microsoft — windows server 2019
Weak authentication in Active Directory Federation Services (AD FS) allows an unauthorized attacker to bypass a security feature over a network.
CVSS
5.9
5.9 (CVSS v3.1)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Severity source: NVD CVSS v3.1 (secure@microsoft.com)
Timeline (UTC)
Published: 2026-10-13 19:19
Modified: 2026-10-28 16:43
NVD status: Analyzed
Last synced 13 hours ago
Verified against the source API 2026-10-28 17:04 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
microsoft / windows_server_2019 <10.0.17763.9376
microsoft / windows_server_2022 <10.0.20348.5761
microsoft / windows_server_2025 <10.0.26100.33650
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70005
Patch / mitigation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70005
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70005 secure@microsoft.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-28 17:04 UTC · record ↗