01 Record
CVE-2026-70005
Active Directory Federation Services (AD FS) Security Feature Bypass Vulnerability
MediumPUBLISHEDCNA: microsoft
CNA base score5.9 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
02 Description
Active Directory Federation Services (AD FS) Security Feature Bypass Vulnerability
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.64% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 50.4% of scored records. A rank, not a probability.
- NVD base score
- 5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-10-28.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-10-13 19:00Z15 DAYS AGO
- Last updated
- 2026-10-28 18:14Z17 HR AGO
- Reserved
- 2026-08-03
- Assigning CNA
- microsoft
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.9)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
- Weaknesses
- CWE-1390Weak AuthenticationClass
- Data version
- 5.2
- Document digest
- 41fb1956f78a0d2018b80fd0ea769fcfdd5686408150c3005ed996f64b98de82
05 Affected products
VendorProductVersionsPlatforms
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 to < 10.0.17763.9376x64-based Systems
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 to < 10.0.26100.33650x64-based Systems
06 References
- msrc.microsoft.comActive Directory Federation Services (AD FS) Security Feature Bypass Vulnerabilityhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70005