How severe is CVE-2025-66174?

CVE-2025-66174 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability low.

Is CVE-2025-66174 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66174?

CVE-2025-66174 primarily affects Hikvision Ds-7104hghi-f1 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-66174?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-66174 have an EU (EUVD) identifier?

Yes. CVE-2025-66174 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204451.

When was CVE-2025-66174 published?

CVE-2025-66174 was published on 2025-12-19 and last updated on 2026-06-17.

CVE-2025-66174

CVE-2025-66174 is a medium-severity vulnerability in Hikvision Ds-7104hghi-f1 Firmware with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204451
Weakness: CWE-287
Affected product: Hikvision Ds-7104hghi-f1 Firmware
Published: 2025-12-19
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-66174?: 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.
How severe is CVE-2025-66174?: CVE-2025-66174 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability low.
Is CVE-2025-66174 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66174?: CVE-2025-66174 primarily affects Hikvision Ds-7104hghi-f1 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-66174?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66174 have an EU (EUVD) identifier?: Yes. CVE-2025-66174 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204451.
When was CVE-2025-66174 published?: CVE-2025-66174 was published on 2025-12-19 and last updated on 2026-06-17.

References

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

Affected products (2)

cpe:2.3:o:hikvision:ds-7104hghi-f1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-7204hghi-f1_firmware:*:*:*:*:*:*:*:*

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