CVE-2025-45851
High
Description
An issue in Hikvision DS-2CD1321-I V5.7.21 build 230819 allows attackers to cause a Denial of Service (DoS) via sending a crafted POST request to the endpoint /ISAPI/Security/challenge. The vendor has stated that upgrading to V5.7.23_SP2 fixes the issue.
SeverityHigh
CVSS7.5
Exploit probability—
ProductDS-2CD1321-I
PublishedJun 27, 2025
First seenJun 27, 2025
How to fix
Update
- Hikvision DS-2CD1321-I5.7.23_SP2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Hikvision DS-2CD1321-I | 5.7.21 build 230819 ≤ v | 5.7.23_SP2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.