A vulnerability found in Dahua NVR/XVR device.

published 2026-03-18 7mo ago modified 2026-06-17 4mo ago also EUVD-2025-208815

cvss: 2.4; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits: 0; none known

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.

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CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 7mo ago (2026-03-18)

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	4.0	2.4	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
CNA	4.0	2.4	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

dahua NVR2-4KS3
dahua XVR4232AN-I/T
dahua XVR1B16H-I/T

Classification

Weakness

CWE-305 Authentication Bypass by Primary Weakness

References

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

Sources

CVE List CVE-2025-31703
NVD CVE-2025-31703

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