CVE-2026-85101
A NVD · · CVE-2026-85101
Admiralty grading (A–F · 1–6)
Source reliability
- A Completely reliable
- B Usually reliable
- C Fairly reliable
- D Not usually reliable
- E Unreliable
- F Cannot be judged
Information credibility
- 1 Confirmed
- 2 Probably true
- 3 Possibly true
- 4 Doubtful
- 5 Improbable
- 6 Cannot be judged
NATO Admiralty (AJP-2.1) grades confidence, independent of the risk score. Cross-source corroboration isn't tracked for non-CVE news, so single-source items are capped at a lower credibility number; a low number does not imply low quality.
Key metrics
- CVSS
- 8.6
- EPSS
- 0%
Key insight
Synology NAS systems are a popular target for ransomware; an authentication bypass with file write capabilities can pave the way for attackers to manipulate or encrypt backups.
Description
The vulnerability CVE-2026-85101 affects the rsync module in Synology DiskStation Manager (DSM) in versions before 7.2.1-69057-13, 7.2.2-72806-10, 7.3.2-86009-5, and 7.4.1-90080-1. By exploiting an alternate path or channel, remote attackers can bypass authentication. As a result, it is possible to read specific files, write arbitrary files, and conduct limited denial-of-service attacks. Active exploitation is not known at the time of publication, and no proof-of-concept has been mentioned. All DSM installations using one of the listed versions and exposing the rsync service are affected.
Risk score
- cvss base
- 86.00
- kev bonus
- 0.00
- epss bonus
- 0.00
- poc bonus
- 0.00
- raw before weight
- 86.00
- industry weight
- 1.21
- freshness factor
- 1.00
- exploitability factor
- 1.00
- days old
- 0.00
- vendor mismatch penalty
- 0.00
Path: operational