Medium severity · published Dec 19, 2025
CVE-2025-66174
There is an improper authentication vulnerability in some Hikvision DVR products
6.8
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Physical
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DF
Ds-7104hghi-f1 Firmware · Hikvision
through 4.30.122_201107 · source: NVD
DF
Ds-7204hghi-f1 Firmware · Hikvision
through 4.30.122_201107 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-66174
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-66174
Vendor Advisory
https://www.hikvision.com/en/support/cybersecurity/security-advisory/serial-port-privilege-escalation-vulnerabilities-in-some-hikvision-nvr-devices/
More from Ds-7104hghi-f1 Firmware
6.2
CVE-2025-66173
There is a privilege escalation vulnerability in some Hikvision DVR products