CVE-2026-70459: rsync 3.0.0 < 3.5.0 Daemon Crash via Malformed File List Entry
CSIRTS triage
- What
- A malformed file list entry causes the rsync daemon to crash, leading to denial of service.
- Who is affected
- rsync daemon instances running versions 3.0.0 through 3.4.x receiving untrusted file lists.
- Urgency
- Medium severity; exploitable remotely to crash the daemon but requires network exposure.
- 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-2026-70459
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-2026-704590.38% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-70459 | coverage & exploitation status | NVD · CVE.org |
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