CVE-2026-39907 Unisys WebPerfect Image Suite 3.0 NTLMv2 Hash Leakage via WCF SOAP
Remote attackers can leak NTLMv2 hashes via SSRF in WCF SOAP endpoints, enabling credential relay and lateral movement.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-39907?
CVE-2026-39907 is a high-severity server-side request forgery vulnerability in Unisys WebPerfect Image Suite, published on 14 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Unisys WebPerfect Image Suite versions 3.0.3960.22810 and 3.0.3960.22604 expose an unauthenticated WCF SOAP endpoint on TCP port 1208 that accepts unsanitized file paths in the ReadLicense action's LFName parameter, allowing remote attackers to trigger SMB connections and leak NTLMv2 machine-account hashes. Attackers can submit crafted SOAP requests with UNC paths to force the server to initiate outbound SMB connections, exposing authentication credentials that may be relayed for privilege escalation or lateral movement within the network.
Weakness: CWE-73
Which versions are affected by CVE-2026-39907?
It affects 1 product.
Products include Unisys Webperfect Image Suite.
How do I fix CVE-2026-39907?
No fix has been published for CVE-2026-39907 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-39907 being exploited?
There is no known exploitation of CVE-2026-39907 in the wild and no public exploit code.
Other vulnerabilities in Unisys WebPerfect Image Suite
Sources
Also known as GHSA-8jpv-7gww-9r9j.