CVE-2026-39906
Unisys WebPerfect Image Suite 3.0 NTLMv2 Hash Leakage via .NET Remoting
- State
- Published
- Severity
- 7.0 High
- Published
- Apr 14, 2026
- Updated
- May 14, 2026
- Reserved
- Apr 7, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.0 High | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N | VulnCheck |
Weaknesses
- CWE-441 Unintended Proxy or Intermediary ('Confused Deputy')
Affected Products
| Product | Versions |
|---|---|
WebPerfect Image SuiteUnisys |
|
References
- https://gist.github.com/VAMorales/be3e4ed472c51794493c1256cce16129technical-descriptionexploit
- https://www.unisys.com/solutions/cai/applications/product
- https://www.vulncheck.com/advisories/unisys-webperfect-image-suite-ntlmv2-hash-leakage-via-net-remotingthird-party-advisory
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