CyberSecBulletin
CVE-2025-66177NVD status: Deferred

DS-96xxxNI-Hx: Stack-based Buffer Overflow

Published Updated By the CyberSecBulletin desk

CVE-2025-66177 is a high-severity stack-based buffer overflow vulnerability in DS-96xxxNI-Hx from Hikvision, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. Affected DS-96xxxNI-Hx versions: Build date before 250807. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.49% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of DS-96xxxNI-Hx you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on hikvision.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
HikvisionDS-96xxxNI-HxBuild date before 250807Not stated
HikvisionDS-96xxxNI-IxBuild date before 250807Not stated
HikvisionDS-96xxNXI-SxBuild date before 250807Not stated
HikvisionDS-96xxxNXI-SxBuild date before 250807Not stated
HikvisionDS-76xxNXI-Mx/VProBuild date before 250807Not stated
HikvisionDS-96xxNXI-Mx/VProBuild date before 250807Not stated
HikvisionDS-76xxNI-MxBuild date before 250807Not stated
HikvisionDS-77xxNI-MxBuild date before 250807Not stated
HikvisionDS-96xxNXI-MxBuild date before 250807Not stated
HikvisionDS-96xxxNXI-MxBuild date before 250807Not stated
HikvisionDS-86xxxNXI-MxBuild date before 250807Not stated
HikvisionDS-76xxNXI-Ix/SBuild date before 250807Not stated
HikvisionDS-77xxNXI-Ix/SBuild date before 250807Not stated
HikvisionDS-86xxNXI-Ix/SBuild date before 250807Not stated
HikvisionDS-96xxNXI-Ix/SBuild date before 250807Not stated
HikvisionDS-76xxNXI-Ix/VProBuild date before 250807Not stated
HikvisionDS-77xxNXI-Ix/VProBuild date before 250807Not stated
HikvisionDS-76xxNXI-Kx(/xP) including(D)、(E)、(B)Build date before 250807Not stated
HikvisionDS-77xxNXI-Kx(/xP) including(D)、(E)、(B)Build date before 250807Not stated
HikvisionDS-76xxNXI-Kx(/xP)/VproBuild date before 250807Not stated
HikvisionDS-77xxNXI-Kx(/xP)/VproBuild date before 250807Not stated
HikvisionDS-76xxNI-Qx(/xP) including(D)、(E)Build date before 250807Not stated
HikvisionDS-71xxNI-Q1(/xP)/MBuild date before 250807Not stated
HikvisionDS-71xxNI-Q1(/xP)Build date before 250807Not stated
HikvisionDS-710xNI-G1/(xP)/MBuild date before 250807Not stated

Version data comes from the organisation that assigned the CVE; 35 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
AdjacentThe attacker must be on the same local network segment.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (hikvision.com).

Official description

There is a Buffer overflow Vulnerability 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.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Stack-based Buffer Overflow

The product writes past the end of a buffer that was allocated on the stack.

How developers prevent this class of flaw

  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking. D3-SFCV (Stack Frame Canary Validation) from D3FEND discusses canary-based detection in detail.
  • Use an abstraction library to abstract away risky APIs. Not a complete solution.
  • Implement and perform bounds checking on input.

More Stack-based Buffer Overflow vulnerabilities (CWE-121)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Stack-based Buffer Overflow vulnerabilities

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