CVE-2022-27593
Qnap Photo Station ≤ 5.2.14
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2022-27593 is a critical-severity Externally Controlled Reference to a Resource in Another Sphere (CWE-610) vulnerability in Qnap Qts. Its CVSS base score is 10.0 (Critical).
Operationally, ranked in the top 0.2% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2022-27593 is an externally controlled reference to a resource vulnerability, tracked under CWE-610, that affects QNAP NAS devices running Photo Station. The flaw permits unauthorized modification of system files and carries a CVSS 3.1 base score of 10.0. QNAP has released fixes in Photo Station 6.1.2 and later for QTS 5.0.1, 6.0.22 and later for QTS 5.0.0/4.5.x, 5.7.18 and later for QTS 4.3.6, 5.4.15 and later for QTS 4.3.3, and 5.2.14 and later for QTS 4.2.6.
An unauthenticated attacker with network access can exploit the issue without user interaction to alter system files on the affected NAS. Successful exploitation can lead to integrity and availability impacts as well as limited confidentiality exposure under the CVSS scope change.
QNAP security advisory QSA-22-24 details the fixed Photo Station versions and urges immediate installation. The vulnerability also appears in the CISA Known Exploited Vulnerabilities catalog, confirming observed in-the-wild exploitation.
The associated EPSS score has reached 0.9378, indicating a high likelihood of exploitation attempts.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-32094
Vulnerability Data
An externally controlled reference to a resource vulnerability has been reported to affect QNAP NAS running Photo Station. If exploited, This could allow an attacker to modify system files. We have already fixed the vulnerability in the following versions: QTS…
more
5.0.1: Photo Station 6.1.2 and later QTS 5.0.0/4.5.x: Photo Station 6.0.22 and later QTS 4.3.6: Photo Station 5.7.18 and later QTS 4.3.3: Photo Station 5.4.15 and later QTS 4.2.6: Photo Station 5.2.14 and later
- CWE(s)
- KEV Date Added
- 08 September 2022
Related Threats
Threat-Actor AttributionAI
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Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Limits impact of an externally controlled reference to a primary information resource by switching to an identified alternative.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Secure development lifecycle mandates validation of all external references to prevent uncontrolled resource access.
A.8.26 only requires that security requirements (including those that could address sphere separation) be identified and specified during development or acquisition; it does not itself enforce, implement or mandate any mechanism that stops external references from resolving outside the intended sphere, so the weakness remains exploitable.
A.8.27 mandates security-by-design principles (least privilege, default-deny, distrust-external-input, fail-securely, zero-trust verification) plus design reviews that can catch and stop many externally-controlled cross-sphere references before they reach production, but leaves a bounded remainder (e.g. runtime name resolution, configuration-driven references, or supplier code not covered by the contract) that can still be present and exploitable.
Secure coding standards require input validation and canonicalization to block externally controlled resource references.
Security testing can detect instances of the weakness but does not prevent it at design or coding time.
Hardening callouts derived
DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.
- No fine-grained STIG row for CWE-610, a class-level weakness, and none of its children carries one either.