CVE-2025-15553

Local privilege escalation via persistent logout session

Published Mar 16, 2026 · Updated Mar 16, 2026

Insufficient session expiration in Truesec LAPSWebUI before 2.4 allows local users to disclose a LAPS-managed administrator password. Logout redirects the browser to Microsoft Entra ID without clearing the .AspNetCore.Cookies cookie or invalidating the server-side session. A person with workstation access can reuse the surviving session to request a computer's local administrator password after Entra sign-out.

CVSS severity6.0
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient session expiration in Truesec LAPSWebUI before 2.4 allows local users to disclose a LAPS-managed administrator password. Logout redirects the browser to Microsoft Entra ID without clearing the .AspNetCore.Cookies cookie or invalidating the server-side session. A person with workstation access can reuse the surviving session to request a computer's local administrator password after Entra sign-out.

The record

CVE
CVE-2025-15553
Published
Mar 16, 2026
Updated
Mar 16, 2026
Vendor
Truesec
Product
LAPSWebUI
Classifications
CWE-613, T1550.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Truesec · LAPSWebUIversion=0 <2.4

Published CVSS scores

6.0National Cyber Security Centre FinlandCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H
7.1NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-613Insufficient Session Expiration
T1550.004Use Alternate Authentication Material: Web Session Cookie

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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