Vulnerability · Published Apr 14, 2026 · Assigned by VulnCheck

CVE-2026-39906Unisys WebPerfect Image Suite 3.0 NTLMv2 Hash Leakage via .NET Remoting

High 7.0

In plain English

A high-severity security flaw in WebPerfect Image Suite from Unisys. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).

Severity (CVSS 4.0)7.0High

Exploit odds (30 days)0.7%top 47.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Unisys	WebPerfect Image Suite	3.0.3960.228103.0.3960.22604

Weakness: CWE-441 · Vector: 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

References

https://gist.github.com/VAMorales/be3e4ed472c51794493c1256cce16129 technical-description, exploit
https://www.unisys.com/solutions/cai/applications/ product
https://www.vulncheck.com/advisories/unisys-webperfect-image-suite-ntlmv2-hash-leakage-via-net-remoting third-party-advisory