CVE-2026-70005
Active Directory Federation Services (AD FS) Security Feature Bypass Vulnerability
No known exploitation. No EPSS score yet. Fixed versions are out.
What to do
Find your product and version, then upgrade to the build on the right.
- Microsoft Windows Server 2019Affected: ≥ 10.0.17763.0, < 10.0.17763.9376Upgrade to: 10.0.17763.9376Stated by: CVE record
- Microsoft Windows Server 2022Affected: ≥ 10.0.20348.0, < 10.0.20348.5761Upgrade to: 10.0.20348.5761Stated by: CVE record
- Microsoft Windows Server 2025Affected: ≥ 10.0.26100.0, < 10.0.26100.33650Upgrade to: 10.0.26100.33650Stated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
Weak authentication in Active Directory Federation Services (AD FS) allows an unauthorized attacker to bypass a security feature over a network.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
No EPSS score yet. New CVEs are usually scored within a few days.
Lifecycle
3 events over 0 days, from the signal feeds we watch.
- Publishedweakness classified, record updated
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Scored 5.9 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality NoneNo confidentiality impact
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability NoneNo availability impact
Weaknesses
Sources
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