CVE-2023-30467Network attack vector

Unauthenticated service interruption via crafted HTTP requests

Published Apr 28, 2023 · Updated Jan 30, 2025

Improper authorization in Milesight 4K/H.265 Series NVR firmware allows remote attackers to interrupt service via crafted HTTP requests. CERT-In identifies the flaw at the web-based management interface but does not disclose the affected endpoint or failed authorization check. Network access to that interface is sufficient without credentials; the published assessment reports an availability impact but does not identify a crash, hang, reboot, or shutdown.

CVSS severity7.5
High
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Milesight 4K/H.265 Series NVR firmware allows remote attackers to interrupt service via crafted HTTP requests. CERT-In identifies the flaw at the web-based management interface but does not disclose the affected endpoint or failed authorization check. Network access to that interface is sufficient without credentials; the published assessment reports an availability impact but does not identify a crash, hang, reboot, or shutdown.

The record

CVE
CVE-2023-30467
Published
Apr 28, 2023
Updated
Jan 30, 2025
Vendor
Milesight
Product
4K/H.265 Series NVR (MS-Nxxxx-xxC)
Classifications
CWE-285, T1190
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

7.5CERT-InCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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-285Improper Authorization
T1190Exploit Public-Facing Application

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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