CVE-2021-33181
Synology
- Published
- 1 June 2021
- Last modified
- 17 June 2026
- CVSS
- 9.1 v3.1
- Severity
- critical
- EPSS
- 1.0% (60th pct)
- CISA KEV
- Not listed
- NVD status
- Modified
- Weaknesses
- CWE-918
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Description
Server-Side Request Forgery (SSRF) vulnerability in webapi component in Synology Video Station before 2.4.10-1632 allows remote authenticated users to send arbitrary request to intranet resources via unspecified vectors.
Exploitation
Not listed in the CISA Known Exploited Vulnerabilities catalogue as of 2026.09.04. That is an absence of confirmed public exploitation, not evidence that exploitation has not occurred. EPSS models a 1.0% probability of exploitation activity in the next 30 days.
Affected products
| Product | Vendor | Type | Versions named |
|---|---|---|---|
| Video Station | Synology | unknown | 1.2-0439, 1.2-0443, 1.2-0447, 1.2-0451 +14 |
References
Vendor advisory and patch
- https://www.synology.com/security/advisory/Synology_SA_21_04
- https://www.synology.com/security/advisory/Synology_SA_21_04
Record assembled from NVD, CISA KEV 2026.09.04 and FIRST EPSS 2026-09-04. Affected products are those NVD's CPE configuration names that fall inside this site's scope; a CVE may affect products outside it.