CVE-2025-66176

Adjacent code execution via unbounded SADP tag copy

Published Jan 13, 2026 · Updated Jan 13, 2026

Stack-based buffer overflow in Hikvision access-control terminals allows remote attackers to execute code via crafted SADP packets. The hicore SADP XML parser copies unbounded start or close tag names into 128-byte stack buffers during tag finalization, allowing stack-frame and program-counter corruption. An unauthenticated attacker must reach UDP port 37020 on the terminal's local network; exploitation grants code execution or interrupts the device.

CVSS severity8.8
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Hikvision access-control terminals allows remote attackers to execute code via crafted SADP packets. The hicore SADP XML parser copies unbounded start or close tag names into 128-byte stack buffers during tag finalization, allowing stack-frame and program-counter corruption. An unauthenticated attacker must reach UDP port 37020 on the terminal's local network; exploitation grants code execution or interrupts the device.

The record

CVE
CVE-2025-66176
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
Hikvision
Product
DS-K1T672
Classifications
CWE-121, T1190
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Versions below V3.7.80

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Hikvision · DS-K1T672version=Versions below V3.7.80
Hikvision · DS-K1T341Cversion=Versions below V3.3.180
Hikvision · DS-K1T680version=Versions below V3.7.80
Hikvision · DS-K1T105A&201A Series Terminalversion=Versions below V1.3.65
Hikvision · DS-K1T804Aversion=Versions below V1.4.22
Hikvision · DS-K1T331version=Versions below V3.7.80
Hikvision · DS-K1T323&DS-K1T510 Series Terminalversion=Versions below V4.23.41
Hikvision · DS-K1T804Bversion=Versions below V1.4.23
Hikvision · DS-K1T981version=Versions below V3.7.80
Hikvision · DS-K1T8003version=Versions below V1.4.21
Hikvision · DS-K5033version=Versions below V4.37.40

Published CVSS scores

8.8HikvisionCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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