CVE-2025-66174

Hikvision

Published: 19 December 2025
Last modified: 17 June 2026
CVSS: 6.8 v3.1
Severity: medium
EPSS: 0.4% (28th pct)
CISA KEV: Not listed
NVD status: Analyzed
Weaknesses: CWE-287

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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 0.4% probability of exploitation activity in the next 30 days.

Affected products

Product	Vendor	Type	Versions named
DS-7104HGHI-F1	Hikvision	unknown	<= 4.30.122_201107
DS-7204HGHI-F1	Hikvision	unknown	4.0.1, <= 4.30.122_201107

References

Vendor advisory and patch

https://www.hikvision.com/en/support/cybersecurity/security-advisory/serial-port-privilege-escalation-vulnerabilities-in-some-hikvision-nvr-devices/

CVE-2025-66174 at NVD

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.