CVE-2026-53792: rsync < 3.5.0 Out-of-Bounds Read via Zero-Length Checksum Block

mediumCVSS 6.5CVE-2026-53792

CSIRTS triage

vendor: rsync product: rsync Memory corruptionaffected: <3.5.0

What: An out-of-bounds read occurs when processing a zero-length checksum block.
Who is affected: rsync versions before 3.5.0 are affected.
Urgency: Medium priority; out-of-bounds read can cause denial of service or information disclosure.
Action: Upgrade to rsync 3.5.0 or later.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 6.5
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53792

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-537920.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53792	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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Recent advisories for rsync <

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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