Information disclosure in Synology Diskstation Manager
CVE-2021-26566
Insertion of sensitive information into sent data vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers to execute arbitrary commands via inbound QuickConnect traffic.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.015 (74.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.synology.com/security/advisory/Synology_SA_20_26 (Vendor Advisory)
- www.talosintelligence.com/vulnerability_reports/TALOS-2020-1160 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-26566?
- CVE-2021-26566 is a high-severity vulnerability in Synology Diskstation Manager, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 8.3/10. Published 2021-02-26.
- How severe is CVE-2021-26566?
- High severity. CVSS v3 base score is 8.3 out of 10.
- Is CVE-2021-26566 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.