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01 Record

CVE-2025-31703

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

LowPUBLISHEDCNA: dahua
CNA base score2.4 CVSS v4.0CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
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02 Description

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

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.29% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 21.3% of scored records. A rank, not a probability.
NVD base score
2.4 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD 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/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
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-03-18 07:13Z7 MO AGO
Last updated
2026-03-18 14:09Z7 MO AGO
Reserved
2025-04-01
Assigning CNA
dahua
Record state
PUBLISHED
Severity
Low (CVSS 2.4)
CNA 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
Weaknesses
  • CWE-305Authentication Bypass by Primary WeaknessBase
Data version
5.2
Document digest
34ab73f73a6f2381718318959e343260e06be472d6a2df08e72eccdc88744e98

05 Affected products

VendorProductVersionsPlatforms
dahuaNVR2-4KS3Versions which Build time prior to 3rd March 2026—
dahuaXVR4232AN-I/TVersions which Build time prior to 3rd March 2026—
dahuaXVR1B16H-I/TVersions which Build time prior to 3rd March 2026—

06 References