Azure Cosmos DB RCE flaw disclosed
A vulnerability in Microsoft Azure Cosmos DB allows an attacker to achieve remote code execution.
Sourcecert.ssi.gouv.fr — open the original
What to check
- Applies to
- The 1 CVE named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
CERT-FR issued an advisory regarding a vulnerability in Microsoft Azure Cosmos DB, tracked as CVE-2026-66803, that could permit a remote attacker to execute arbitrary code on affected systems. The advisory is based on a Microsoft security bulletin published on 30 July 2026, and administrators are directed to apply the vendor-provided patches referenced in the official documentation.
No details on active exploitation, proof-of-concept availability, or specific threat actors were provided in this brief bulletin. Organizations using Azure Cosmos DB should review the Microsoft Security Response Center guidance and apply remediation promptly given the potential impact of remote code execution on a widely used cloud database service.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0953
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