CVE-2023-30466Network attack vector

Account takeover via weak password reset

Published Apr 28, 2023 · Updated Jan 30, 2025

Authentication bypass in Milesight 4K/H.265 Series NVR firmware allows remote attackers to take over device accounts. The web management interface accepts crafted HTTP password-reset requests through a weak recovery mechanism without authenticating the requester. No credentials or user interaction are required, and successful exploitation permits unauthorized activity on the targeted recorder.

CVSS severity9.8
Critical
EPSS probability1.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Milesight 4K/H.265 Series NVR firmware allows remote attackers to take over device accounts. The web management interface accepts crafted HTTP password-reset requests through a weak recovery mechanism without authenticating the requester. No credentials or user interaction are required, and successful exploitation permits unauthorized activity on the targeted recorder.

The record

CVE
CVE-2023-30466
Published
Apr 28, 2023
Updated
Jan 30, 2025
Vendor
Milesight
Product
4K/H.265 Series NVR (MS-Nxxxx-xxC)
Classifications
CWE-640, CAPEC-50, T1098
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=73.X <73.9.0.18-r2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Milesight · 4K/H.265 Series NVR (MS-Nxxxx-xxC)version=73.X <73.9.0.18-r2
Milesight · 4K/H.265 Series NVR (MS-Nxxxx-xxT)version=72.X <72.9.0.18-r2
Milesight · 4K/H.265 Series NVR (MS-Nxxxx-xxH)version=71.X <71.9.0.18-r2
Milesight · 4K/H.265 Series NVR (MS-Nxxxx-xxE)version=75.X <75.9.0.18-r2
Milesight · 4K/H.265 Series NVR (MS-Nxxxx-xxG)version=77.X <77.9.0.18-r2

Published CVSS scores

9.8CERT-InCVSS:3.1/AV:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-640Weak Password Recovery Mechanism for Forgotten Password
CAPEC-50Password Recovery Exploitation
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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