🟠High  | Source: Microsoft Security Response Center
CVE-2026-7383 is a possible heap buffer overflow vulnerability in ASN.1 multibyte string conversion, affecting Microsoft Azure services or components that rely on this cryptographic encoding standard. Heap buffer overflows can allow attackers to corrupt memory, potentially leading to remote code execution or denial of service. The impact depends on where the vulnerable component is deployed and whether it is reachable by untrusted input.
Security Architect’s Take: Review any Azure services or workloads that process ASN.1-encoded data — such as certificate handling, PKI pipelines, or TLS termination points — and apply Microsoft’s patches promptly. If a patch is not yet available, consider restricting exposure of affected endpoints and monitoring for anomalous certificate or encoding-related traffic.
Original advisory: CVE-2026-7383 Possible Heap Buffer Overflow in ASN.1 Multibyte String Conversion