CVE•Published 2026-08-13•Modified 2026-08-31•1 article on news•5 live references•NVD data
CVE-2026-53791Samba · Rsync
Vulnerability data via NVD (ingested)
CVSS v3.1
9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS percentile
39
Exploit Prediction Scoring System · top 61% of all CVEs
Weaknesses (CWE)
Description
rsync daemon before 3.5.0 contains an IP address spoofing vulnerability that allows unauthenticated remote attackers to bypass IP-based access controls by sending a crafted PROXY protocol header with a forged source address. Attackers who can connect directly to the rsync daemon can inject a spoofed source IP in the PROXY protocol header to circumvent hosts allow/deny rules, gaining unauthorized access that would otherwise be blocked based on their real source address.
Timeline
Published 2026-08-13
Modified 2026-08-31
External references
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-2026-53791Hosts 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-2026-53791Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-53791Censys host search filtered to this CVE id.
grep.app
CVE-2026-53791Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-53791GitHub code search for direct mentions.
Google dork
"CVE-2026-53791" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-53791 on GitHub.