Vulnerability Report

CVE-2026-27912

Title: Improper Authorization in Windows Kerberos

Auth Bypass

Proof Of Concept

PoC Available for CVE-2026-27912

CWE Category CWE-285

Published Date Apr 14, 2026

Modified Date Apr 23, 2026

Exploit Status Available

Score 8.0 CVSS v3.1

Exploit Probability (EPSS)

0.24%

Vulnerability Summary

CVE-2026-27912: Improper authorization in Windows Kerberos allows an authorized attacker to elevate privileges over an adjacent network.

Impacted Vendors

microsoft 6

Reference Links

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27912

CVSS v3.1

Source Entity [email protected]

Severity HIGH

8.0

Attack Vector

ADJACENT_NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-27912 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/Semperis-Community/ResetNightmare

View Code

GitHub https://github.com/mihat2/ResetNightmare-impacket

View Code

April 23, 2026 MODIFIED

Vulnerability data updated via NVD.

April 23, 2026 MODIFIED

Vulnerability data updated via NVD.

April 17, 2026 MODIFIED

Vulnerability data updated via NVD.

April 14, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector ADJACENT_NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.