CVE-2025-31703 PUBLISHED

Assigner: dahua
Reserved: 01.04.2025 Published: 18.03.2026 Updated: 18.03.2026

A vulnerability found in Dahua NVR/XVR device. A third-party malicious attacker with physical access to the device may gain access to a restricted shell via the serial port, and bypasses the shell's authentication mechanism to escalate privileges.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
CVSS Score: 2.4

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Physical	Confidentiality	Low	Confidentiality	Low
Attack Complexity	Low	Integrity	Low	Integrity	Low
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	dahua
Product	NVR2-4KS3
Versions	Default: unaffected Version Versions which Build time prior to 3rd March 2026 is affected

Vendor	dahua
Product	XVR4232AN-I/T
Versions	Default: unaffected Version Versions which Build time prior to 3rd March 2026 is affected

Vendor	dahua
Product	XVR1B16H-I/T
Versions	Default: unaffected Version Versions which Build time prior to 3rd March 2026 is affected

References

https://www.dahuasecurity.com/about-dahua/trust-center/dahua-psirt/security-advisory-%E2%80%93-vulnerability-found-in-dahua-nvr-xvr-device

Problem Types

CWE-305 Authentication bypass by primary weakness CWE

Impacts

CAPEC-233 Privilege Escalation