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Fencer Vulns
critical 9.8

CVE-2023-30466 json

Authentication Bypass Vulnerability in Milesight Network Video Recorder (NVR)

published 2023-04-28 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-34881

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

This vulnerability exists in Milesight 4K/H.265 Series NVR models (MS-Nxxxx-xxG, MS-Nxxxx-xxE, MS-Nxxxx-xxT, MS-Nxxxx-xxH and MS-Nxxxx-xxC), due to a weak password reset mechanism at the Milesight NVR web-based management interface. A remote attacker could exploit this vulnerability by sending a specially crafted http requests on the targeted device.

Successful exploitation of this vulnerability could allow remote attacker to account takeover on the targeted device.

Patch / fix

  • Milesight NVR MS-Nxxxx-xxG 77.9.0.18-r2
  • Milesight NVR MS-Nxxxx-xxE 75.9.0.18-r2
  • Milesight NVR MS-Nxxxx-xxT 72.9.0.18-r2
  • Milesight NVR MS-Nxxxx-xxH 71.9.0.18-r2
  • Milesight NVR MS-Nxxxx-xxC 73.9.0.18-r2

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
21 mo ago

Exploit prediction

1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Milesight NVR MS-Nxxxx-xxG
  • Milesight NVR MS-Nxxxx-xxE
  • Milesight NVR MS-Nxxxx-xxT
  • Milesight NVR MS-Nxxxx-xxH
  • Milesight NVR MS-Nxxxx-xxC

Classification

Weakness
  • CWE-640 Weak Password Recovery Mechanism for Forgotten Password

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.