CVE-2020-27648 json
Improper certificate validation vulnerability in OpenVPN client in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-th…
published 2020-10-29 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-20155
- cvss
- 8.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
Improper certificate validation vulnerability in OpenVPN client in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
Patch / fix
- Synology DiskStation Manager (DSM) 6.2.3-25426-2
Exploit prediction
0.72% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- talosintelligence.com https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1058 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 9.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- Synology DiskStation Manager (DSM)
Classification
- Weakness
-
- CWE-295 Improper Certificate Validation
References
-
talosintelligence.com
/vulnerability_reports/TALOS-2020-1058
exploit, third-party-advisory
-
synology.com
/security/advisory/Synology_SA_20_18
vendor-advisory
Sources
- CVE List CVE-2020-27648
- NVD CVE-2020-27648
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