CVE-2024-22769Known exploitationPublic exploitNetwork attack vector

Authenticated command execution via timeserver injection

Published Jan 23, 2024 · Updated May 30, 2025

OS command injection in Hitron Systems DVR HVR-8781 1.03 through 4.02 allows remote authenticated users to execute commands. The /cgi-bin/system_ntp.cgi handler passes the timeserver POST parameter to the operating system without neutralizing shell metacharacters. Access requires management-interface authentication, but observed attacks used default administrator credentials to install Mirai-based malware and enlist DVRs in a DDoS botnet.

CVSS severity7.4
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Hitron Systems DVR HVR-8781 1.03 through 4.02 allows remote authenticated users to execute commands. The /cgi-bin/system_ntp.cgi handler passes the timeserver POST parameter to the operating system without neutralizing shell metacharacters. Access requires management-interface authentication, but observed attacks used default administrator credentials to install Mirai-based malware and enlist DVRs in a DDoS botnet.

The record

CVE
CVE-2024-22769
Published
Jan 23, 2024
Updated
May 30, 2025
Vendor
Hitron Systems
Product
DVR HVR-8781
Classifications
CWE-20, CWE-798, CAPEC-490, T1190, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 23, 2024CVE publishedPublication date reported by the CVE source.
  2. May 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=1.03 <=4.02 changes=[{"at":"4.03","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Hitron Systems · DVR HVR-8781version=1.03 <=4.02 changes=[{"at":"4.03","status":"unaffected"}]

Published CVSS scores

7.4KRCERT/CCCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
7.5NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-798Use of Hard-coded Credentials
CAPEC-490Amplification
T1190Exploit Public-Facing Application
T1059.004Unix Shell

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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