CVE-2026-39906 Details
Description
Unisys WebPerfect Image Suite versions 3.0.3960.22810 and 3.0.3960.22604 expose a deprecated .NET Remoting TCP channel that allows remote unauthenticated attackers to leak NTLMv2 machine-account hashes by supplying a Windows UNC path as a target file argument through object-unmarshalling techniques. Attackers can capture the leaked NTLMv2 hash and relay it to other hosts to achieve privilege escalation or lateral movement depending on network configuration and patch level.
A vulnerability in Unisys WebPerfect Image Suite versions 3.0.3960.22810 and 3.0.3960.22604 allows remote unauthenticated attackers to leak NTLMv2 machine-account hashes. This is achieved by exploiting a deprecated .NET Remoting TCP channel, where attackers can supply a Windows UNC path as a target file argument. The object-unmarshalling techniques used in this process enable the interception of NTLMv2 hashes, which can then be relayed to other hosts for privilege escalation or lateral movement, depending on the network configuration and patch level.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 16, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gist.github.com/VAMorales/be3e4ed472c51794493c1256cce16129 | [email protected] | ExploitThird Party Advisory |
| https://www.unisys.com/solutions/cai/applications/ | [email protected] | Product |
| https://www.vulncheck.com/advisories/unisys-webperfect-image-suite-ntlmv2-hash-leakage-via-net-remoting | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-441 | Unintended Proxy or Intermediary ('Confused Deputy') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| unisys webperfect image suite | 3.0.3960.22604 3.0.3960.22810 |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 6, 2026 | Initial Analysis | [email protected] |
| Apr 23, 2026 | CVE Modified | [email protected] |
| Apr 14, 2026 | New CVE Received | [email protected] |