CVE•Published 2025-08-29•Modified 2026-10-18•1 article on news•5 live references•NVD data
CVE-2025-52856Qnap · Qvr
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
50
Exploit Prediction Scoring System · top 50% of all CVEs
Weaknesses (CWE)
Description
An improper authentication vulnerability has been reported to affect VioStor. If a remote attacker, they can then exploit the vulnerability to compromise the security of the system. We have already fixed the vulnerability in the following version: VioStor 5.1.6 build 20250621 and later
Timeline
Published 2025-08-29
Modified 2026-10-18
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-2025-52856Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Qnap Qvr"All exposed Qnap Qvr instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Qvr"HTTP body or banner mentions "Qvr" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2025-52856Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-52856Censys host search filtered to this CVE id.
grep.app
CVE-2025-52856Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2025-52856GitHub code search for direct mentions.
Google dork
"CVE-2025-52856" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.