CVE-2026-53801: rsync < 3.5.0 Symlink Race Condition Directory Traversal
CSIRTS triage
- What
- A symlink race condition enables directory traversal and unauthorized file access outside the sync scope.
- Who is affected
- Deployments using rsync versions prior to 3.5.0.
- Urgency
- Medium severity; race condition exploitation requires precise timing but could bypass directory restrictions.
- Action
- Upgrade rsync to version 3.5.0 or later.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53801
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-2026-538010.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-53801 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
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