Medium severity · published Dec 4, 2025
CVE-2025-29843
A vulnerability in FileStation thumb cgi allows remote authenticated users to read/write image files
5.4
CVSS
0.4%
EPSS
No
On KEV
Description
A vulnerability in FileStation thumb cgi allows remote authenticated users to read/write image files.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SR
Synology Router Manager (SRM) · Synology
1.3 before 1.3.1-9346-13 · source: vendor
RM
Router Manager · Synology
1.3 before 1.3.1-9346; 1.3.1-9346; 1.3.1-9346; 1.3.1-9346; 1.3.1-9346; 1.3.1-9346; +8 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-29843
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-29843
Vendor Advisory
https://www.synology.com/en-global/security/advisory/Synology_SA_25_04
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