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PatchSiren cyber security CVE debrief

CVE-2025-66177 Hikvision CVE debrief

A buffer overflow vulnerability exists in the device Search and Discovery feature of Hikvision NVR/DVR/CVR/IPC models. If exploited, an attacker on the same local area network (LAN) could cause the device to malfunction by sending specially crafted packets to an unpatched device. This issue has a CVSS score of 8.8 and is classified as HIGH severity. Organizations should prioritize patching to prevent potential device malfunction.

Vendor
Hikvision
Product
DS-96xxxNI-Hx
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-01-13
Original CVE updated
2026-07-09
Advisory published
2026-01-13
Advisory updated
2026-07-09

Who should care

Organizations using Hikvision NVR/DVR/CVR/IPC models should prioritize patching this vulnerability to prevent potential device malfunction. Security teams and administrators responsible for these devices should review the CVE and NVD details for further guidance.

Technical summary

The vulnerability has a CVSS score of 8.8 and is classified as HIGH severity. It affects the device Search and Discovery feature of Hikvision NVR/DVR/CVR/IPC models. An attacker on the same local area network (LAN) could exploit this vulnerability by sending specially crafted packets to an unpatched device, potentially causing device malfunction. The CVE record was published on 2026-01-13T03:16:01.250Z and was last modified on 2026-07-09T07:16:22.607Z.

Defensive priority

High priority should be given to patching this vulnerability, as it could lead to device malfunction if exploited.

Recommended defensive actions

  • Apply patches or updates provided by the vendor to address the buffer overflow vulnerability.
  • Implement network segmentation to limit the attack surface.
  • Monitor network traffic for suspicious activity.
  • Conduct regular vulnerability assessments and penetration testing.
  • Consider implementing compensating controls, such as intrusion detection and prevention systems.
  • Review relevant monitoring, detection, and logs for exposed assets that need extra review.
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record was published on 2026-01-13T03:16:01.250Z and was last modified on 2026-07-09T07:16:22.607Z. The NVD entry is currently Deferred. The source details indicate a buffer overflow vulnerability exists in Hikvision NVR/DVR/CVR/IPC models, which could allow an attacker on the same local area network (LAN) to cause device malfunction by sending specially crafted packets. Evidence is limited to CVE and NVD details.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-66177 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-66177

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-66177 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-66177

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://www.hikvision.com/en/support/cybersecurity/security-advisory/buffer-overflow-vulnerabilities-in-some-hikvision-products/

    [email protected]

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.