PatchTheCVECVE-2025-66174: There is an improper authentication vulnerability in some Hikvision DVR products
CVE-2025-66174 is a medium-severity flaw (CVSS 6.5) affecting ds-7104hghi-f1 firmware, ds-7204hghi-f1 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
There is an improper authentication vulnerability in some Hikvision DVR products. Due to the improper implementation of authentication for the serial port, an attacker with physical access could exploit this vulnerability by connecting to the affected products and run a series of commands.
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 71%) |
| CISA exploited list | No |
| Weakness | CWE-287 |
| Published | 2025-12-19 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-66174?
ds-7104hghi-f1 firmware: upgrade to newer than 4.30.122_201107; ds-7204hghi-f1 firmware: upgrade to newer than 4.30.122_201107. Exact commands for each OS are on this page.
Is CVE-2025-66174 being exploited?
CVE-2025-66174 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2025-66174 affect?
CVE-2025-66174 affects ds-7104hghi-f1 firmware, ds-7204hghi-f1 firmware. Severity is medium (CVSS 6.5). There is an improper authentication vulnerability in some Hikvision DVR products. Due to the improper implementation of authentication for the serial port, an attacker with physical access could exploit this vulnerability by connecting to t
How urgent is CVE-2025-66174?
Priority 35/100. Remotely exploitable, no login, no user action
Software pages
Related CVEs
- CVE-2025-66173 MEDIUM 6.2 UPGRADE UPGRADE There is a privilege escalation vulnerability in some Hikvision DVR products