Auth bypass in Synology Diskstation Manager
CVE-2025-2848
A vulnerability in Synology Mail Server allows remote authenticated attackers to read and write non-sensitive settings, and disable some non-critical functions.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (28.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Synology Diskstation Manager — versions 7.1, 7.2
- Synology Mail Server
- Synology Mail Server
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.synology.com/en-global/security/advisory/Synology_SA_25_05 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-2848?
- CVE-2025-2848 is a medium-severity vulnerability in Synology Diskstation Manager, classified under Missing Authorization. CVSS score: 6.3/10. Published 2025-12-04.
- How severe is CVE-2025-2848?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2025-2848 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.