Authenticated privileged-thread hijacking via impersonation misconfiguration
Published Apr 14, 2026 · Updated Apr 14, 2026
.NET impersonation flaw in upKeeper Instant Privilege Access through 1.5.0 allows remote authenticated users to hijack a privileged thread. The client service accepts information from network users while using .NET impersonation, but upKeeper has not disclosed the handler or unsafe identity transition. The low-privileged user must also satisfy an unspecified attack condition; successful abuse exposes information and the privileged service's execution context.
Summary
What happened
.NET impersonation flaw in upKeeper Instant Privilege Access through 1.5.0 allows remote authenticated users to hijack a privileged thread. The client service accepts information from network users while using .NET impersonation, but upKeeper has not disclosed the handler or unsafe identity transition. The low-privileged user must also satisfy an unspecified attack condition; successful abuse exposes information and the privileged service's execution context.
The record
- CVE
- CVE-2026-2450
- Published
- Apr 14, 2026
- Updated
- Apr 14, 2026
- Vendor
- upKeeper Solutions AB
- Product
- upKeeper Instant Privilege Access
- Classifications
- CWE-520, CAPEC-30, T1055.003
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 14, 2026CVE publishedPublication date reported by the CVE source.
- Apr 14, 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.
- Affected versionversion=0 <=1.5.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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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