CVE•Published 2026-05-20•Modified 2026-05-21•0 articles on news•6 live references•NVD data

CVE-2026-43617Samba · Rsync

Vulnerability data via NVD (ingested)

CVSS v3.1

4.8

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS percentile

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Weaknesses (CWE)

CWE-289Authentication Bypass by Alternate Name

Description

Rsync version 3.4.2 and prior contain an authorization bypass vulnerability in the rsync daemon's hostname-based access control list enforcement when configured with chroot. Attackers can bypass hostname-based deny rules by controlling the PTR record for their source IP address, allowing connections from hostnames that administrators intended to deny when reverse DNS resolution fails and defaults to UNKNOWN.

Timeline

Published 2026-05-20

Modified 2026-05-21

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-43617

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Samba Rsync"

All exposed Samba Rsync instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Rsync"

HTTP body or banner mentions "Rsync" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-43617