CVE-2024-0643Network attack vector

Unauthenticated host compromise via unrestricted file upload

Published Jan 17, 2024 · Updated Jun 2, 2025

Unrestricted file upload in Cires21 C21 Live Encoder 5.3 allows remote attackers to compromise the host via dangerous file types. The upload handler accepts attacker-supplied files regardless of extension, but public sources do not identify the endpoint or validation code. Network access without authentication or user interaction is sufficient, and successful upload results in full host compromise.

CVSS severity10.0
Critical
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Cires21 C21 Live Encoder 5.3 allows remote attackers to compromise the host via dangerous file types. The upload handler accepts attacker-supplied files regardless of extension, but public sources do not identify the endpoint or validation code. Network access without authentication or user interaction is sufficient, and successful upload results in full host compromise.

The record

CVE
CVE-2024-0643
Published
Jan 17, 2024
Updated
Jun 2, 2025
Vendor
Cires21
Product
C21 Live Encoder
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 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=5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cires21 · C21 Live Encoderversion=5.3

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0INCIBECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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-434Unrestricted Upload of File with Dangerous Type
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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