CRITICAL 9.1 Microsoft
CVE-2026-53791
rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header
Microsoft Security Update 2026-Aug: rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header
Affected Products
- azl3 rsync 3.4.3-1 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53791
- https://nvd.nist.gov/vuln/detail/CVE-2026-53791
This critical severity vulnerability with a CVSS score of 9.1 was published on 2026-08-11 via Microsoft. Affected: azl3 rsync 3.4.3-1 on Azure Linux 3.0.
Risk Timeline
CVE Disclosed2026-08-11 · 46 days ago
Remediation Resources
Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53791NVD / MITRE
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