VulnSocial

CVE-2026-53783(samba / rsync)

LOWCVSS 8.6 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink for a path component after validation but before transfer processing. Attackers can additionally leverage unrestricted flags such as --copy-unsafe-links, -D, and --log-file through rrsync to read or write files outside the permitted directory subtree.

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0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-59CWE-88

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • rsync

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Affected systems

Vendors
samba
Products
rsync

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-11-06: 111-06
Full discourse1 post
  • Upwind Security MDR@UpwindMDR

    🚨High - rsync rrsync TOCTOU Symlink Escape (CVE-2026-53783) A TOCTOU race in rsync’s rrsync restricted shell wrapper lets an authenticated client pass path validation then swap in a symlink before transfer processing, escaping the enforced directory subtree. Abuse of allowed flags like --copy-unsafe-links, -D, and --log-file can enable read/write outside the permitted root. Standard rsync without rrsync restrictions isn’t impacted. 👉Affected: rsync (rrsync) < 3.5.0 | Upgrade to 3.5.0

    0000066
    389 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appsambarsync---

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