EUVD-2026-39453
GHSA-957m-3336-c6fv
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local vector with scope change because intercepted credentials affect subsequent HYPR-protected systems; PR:L and UI:R map directly from the 4.0 PR:L/UI:P constraints.
Primary rating from Vendor (HYPR).
CVSS VectorVendor: HYPR
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
Missing authentication for critical function vulnerability in HYPR Passwordless on Windows allows Credentials Interception.
This issue affects HYPR Passwordless: before 11.1.1.
AnalysisAI
Credential interception in HYPR Passwordless on Windows (all versions before 11.1.1) is possible due to a missing authentication check on a critical internal function (CWE-306), allowing a low-privileged local attacker to capture authentication material during an active user session. The CVSS 4.0 vector's SC:H metric confirms the intercepted credentials are usable against downstream systems that HYPR protects, elevating the downstream blast radius beyond the compromised endpoint. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires all of the following: (1) a Windows endpoint with HYPR Passwordless installed at a version earlier than 11.1.1; (2) an existing low-privilege local account on that machine - administrative rights are not required but unauthenticated remote access is not possible (AV:L, PR:L per CVSS 4.0 vector); (3) a legitimate user must be actively performing a HYPR authentication event on the same machine during the attack window (UI:P). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 6.7 reflects meaningful real-world constraints that moderate the raw risk: the local attack vector (AV:L) requires an existing foothold on the target Windows endpoint, low privileges (PR:L) confirm the attacker need not be an administrator, and passive user interaction (UI:P) creates a timing dependency on a legitimate user actively authenticating. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained a low-privilege local account on a HYPR-enrolled Windows workstation deploys a lightweight interception process that monitors the unauthenticated internal function. When a legitimate employee initiates their HYPR passwordless login (the required passive user interaction), the attacker's process captures the authentication token or credential material in transit. … |
| Remediation | Upgrade HYPR Passwordless to version 11.1.1 or later, which is the vendor-confirmed fixed release per the advisory at https://www.hypr.com/trust-center/security-advisories. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today