What is CVE-2026-39906?

CVE-2026-39906 is a critical-severity vulnerability in Unisys Webperfect Image Suite, classified under Unintended Proxy or Intermediary (Confused Deputy). CVSS score: 10.0/10. Published 2026-04-14.

How severe is CVE-2026-39906?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Vulnerability in Unisys Webperfect Image Suite

CVE-2026-39906

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…

EPSS: 0.001 (26.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Unisys Webperfect Image Suite — versions 3.0.3960.22810, 3.0.3960.22604
Unisys Webperfect_image_suite — versions 3.0.3960.22604, 3.0.3960.22810

Weakness classification (CWE)

CWE-441 — Unintended Proxy or Intermediary (Confused Deputy)

References

disclosure@vulncheck.com (Exploit, technical-description, Third Party Advisory, exploit)
disclosure@vulncheck.com (Product, product)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-39906?: CVE-2026-39906 is a critical-severity vulnerability in Unisys Webperfect Image Suite, classified under Unintended Proxy or Intermediary (Confused Deputy). CVSS score: 10.0/10. Published 2026-04-14.
How severe is CVE-2026-39906?: Critical severity. CVSS v3 base score is 10.0 out of 10.