CVE-2019-1234: Azure Stack request validation spoofing flaw

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 18 September 2026. Confidence: medium.

high priorityHigh CVSS (7.5) with no authentication or interaction required and very high EPSS probability, though no confirmed in-the-wild exploitation.

What it is

Azure Stack fails to validate certain requests, allowing a spoofing attack that bypasses authentication. The flaw is remotely reachable without credentials or user interaction and can compromise integrity of the platform.

Impact

An attacker can impersonate a trusted identity or service and bypass authentication, gaining unauthorized access to Azure Stack resources or operations.

Attack surface

Reachable over the network via crafted requests to Azure Stack; the CVSS vector shows no privileges and no user interaction required.

Exploitation

Not listed in CISA KEV and no ransomware usage documented, but EPSS is very high (0.75, 99.5th percentile), indicating elevated likelihood of exploitation.

What to do

• Apply the Microsoft security update referenced in the vendor advisory for CVE-2019-1234.
• Restrict network exposure of Azure Stack management endpoints to trusted networks.
• Monitor and log authentication and request validation events for anomalies.
• Review Check Point research for additional context on Azure cloud attack paths.

Detection

• Alert on spoofed or malformed requests reaching Azure Stack endpoints.
• Monitor authentication logs for successful access from unexpected sources.
• Correlate unusual request patterns with the Check Point research indicators.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.