EUVD-2026-73176
GHSA-ffcr-244p-cmjq
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Exploiting a client-side signature verification flaw requires MITM network positioning, making AC:H more accurate than the vendor-assigned AC:L.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Improper verification of cryptographic signature in Windows RDP Client allows an unauthorized attacker to disclose information over a network.
AnalysisAI
Cryptographic signature verification failure in the Remote Desktop client for Windows Desktop (versions 1.2.0.0 through below 1.2.7279.0) exposes session or authentication material to network-based interception. The 'Jwt Attack' technique tag combined with CWE-347 indicates the client insufficiently validates JWT signatures used in modern RDP authentication flows - likely those tied to Azure AD/Entra ID single-sign-on - permitting an attacker to intercept or substitute cryptographic tokens. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an attacker to be positioned on the network path between the victim's Remote Desktop client for Windows Desktop and the RDP server or Azure Virtual Desktop gateway - a man-in-the-middle position. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) reflects a high-severity, no-prerequisite network vulnerability with total confidentiality impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade the Remote Desktop client for Windows Desktop to version 1.2.7279.0 or later, which contains the vendor-released patch per Microsoft's advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57098. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Remote Desktop client installations organization-wide, specifically identifying instances running versions 1.2.0.0 through 1.2.7278.x, with emphasis on systems accessing Azure AD-connected resources. …
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