System-file modification via externally controlled resource reference
Published Sep 8, 2022 · Updated Oct 21, 2025
Externally controlled resource references in QNAP Photo Station allow remote attackers to modify system files over the network. The public advisory identifies the resource-reference weakness but does not disclose the affected request handler, referenced resource, or validation error enabling the file write. Exploitation requires an internet-exposed Photo Station instance and no authentication or user interaction; successful attacks can alter system files and have been used in DeadBolt ransomware campaigns.
Summary
What happened
Externally controlled resource references in QNAP Photo Station allow remote attackers to modify system files over the network. The public advisory identifies the resource-reference weakness but does not disclose the affected request handler, referenced resource, or validation error enabling the file write. Exploitation requires an internet-exposed Photo Station instance and no authentication or user interaction; successful attacks can alter system files and have been used in DeadBolt ransomware campaigns.
The record
- CVE
- CVE-2022-27593
- Published
- Sep 8, 2022
- Updated
- Oct 21, 2025
- Vendor
- Linn Products Limited
- Product
- Photo Station
- Classifications
- CWE-610, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 3, 2022Exploitation reportedDeadBolt ransomware campaign targeting internet-exposed Photo Station
- Sep 8, 2022CVE publishedPublication date reported by the CVE source.
- Oct 21, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <5.2.14
- Affected versionversion=unspecified <5.4.15
- Affected versionversion=unspecified <5.7.18
- Affected versionversion=unspecified <6.0.22
- Affected versionversion=unspecified <6.1.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
View daily counts
| Reporting day | Unique IPs |
|---|---|
| Sep 10, 2026 | 1 |
| Sep 11, 2026 | Unavailable |
| Sep 12, 2026 | Unavailable |
| Sep 13, 2026 | 1 |
| Sep 14, 2026 | 1 |
| Sep 15, 2026 | Unavailable |
| Sep 16, 2026 | 1 |
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- DeadBolt ransomware campaign targeting internet-exposed Photo Stationransomware
- CISA Known Exploited Vulnerabilities catalog listingknown exploited catalog
Technologies
Your stack
See the directory against your own environment.
Your stack
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