CyberSecBulletin
CVE-2025-66176NVD status: Modified

DS-K1T331: Stack-based Buffer Overflow

Published Updated By the CyberSecBulletin desk

CVE-2025-66176 is a high-severity stack-based buffer overflow vulnerability in DS-K1T331 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-K1T331 versions: Versions below V3.7.80. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.47% 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. Update Ds-k1t331 Firmware to 3.7.80 or a later version.
  2. Update Ds-k1t341a Firmware to 3.7.80 or a later version.
  3. Update Ds-k1t341b Firmware to 3.7.80 or a later version.
  4. Read the advisory on hikvision.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
HikvisionDS-K1T331Versions below V3.7.80Not stated
HikvisionDS-K1T341A/K1T341BVersions below V3.7.80Not stated
HikvisionDS-K1T671/K5671Versions below V3.7.80Not stated
HikvisionDS-K1T672Versions below V3.7.80Not stated
HikvisionDS-K1T680Versions below V3.7.80Not stated
HikvisionDS-K1T981Versions below V3.7.80Not stated
HikvisionDS-K1T341CVersions below V3.3.180Not stated
HikvisionDS-K1T670/K1T673Versions below V4.48.0Not stated
HikvisionDS-K1T8003Versions below V1.4.21Not stated
HikvisionDS-K1T804AVersions below V1.4.22Not stated
HikvisionDS-K1T8003/8004Versions below V1.4.21Not stated
HikvisionDS-K1T804BVersions below V1.4.23Not stated
HikvisionDS-K1T201A/K1T105AVersions below V1.3.65Not stated
HikvisionDS-K1T342/K1T343/K1T344/DS-K1T6QT-F72/F43Versions below V4.48.0Not stated
HikvisionDS-K1T8005/DS-K1T808Versions below V3.25.40Not stated
HikvisionDS-K1T320/DS-K1T321Versions below V3.9.40Not stated
HikvisionDS-K1T323/DS-K1T510Versions below V4.23.41Not stated
HikvisionDS-K5033Versions below V4.37.40Not stated
HikvisionDs-k1t331 Firmwarebefore 3.7.803.7.80
HikvisionDs-k1t341a Firmwarebefore 3.7.803.7.80
HikvisionDs-k1t341b Firmwarebefore 3.7.803.7.80
HikvisionDs-k1t671 Firmwarebefore 3.7.803.7.80
HikvisionDs-k5671 Firmwarebefore 3.7.803.7.80
HikvisionDs-k1t672 Firmwarebefore 3.7.803.7.80
HikvisionDs-k1t680 Firmwarebefore 3.7.803.7.80

Version data comes from the organisation that assigned the CVE; 21 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 Access Control Products. 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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