CVE-2026-53789: rsync < 3.5.0 Arbitrary File Deletion via Malicious File List

CSIRTS triage

What

Arbitrary file deletion is possible via a maliciously crafted file list.

Who is affected

rsync versions before 3.5.0 processing untrusted file lists are affected.

Urgency

Medium priority; arbitrary file deletion can cause data loss and service disruption.

Action

Upgrade to rsync 3.5.0 or later.

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

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-2026-53789

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-2026-537890.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• high[NEW] [high] Rsync: Multiple vulnerabilitiescert-bund
• mediumCVE-2026-53789: rsync before 3.5.0 contains an improper path handling vulnerability that allows a malicious se…nvd

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