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VulnerabilityPublished Updated

CVE-2024-0643: Cires21 C21 Live Encoder and Live Mosaic · Unrestricted File Upload

Affects Cires21 C21 Live Encoder and Live MosaicSource CVE Database V5

0

Not known to be exploited · CVSS 10.0 Critical.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score
10.0Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Jan 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Cires21 C21 Live Encoder and Live MosaicAffected
  • =5.3
Fixed in–

AI-suggested

Immediate mitigation steps include isolating affected systems from untrusted networks to reduce exposure. Organizations should implement strict network segmentation and firewall rules to limit access to the encoding devices. Since no patches are currently available, consider disabling or restricting the file upload functionality where possible. Employ application-layer filtering or proxy solutions to inspect and block uploads of dangerous file types. Monitor logs and network traffic for unusual upload activity or signs of exploitation attempts. Engage with the vendor, Cires21, to obtain updates on patch availability and apply security updates as soon as they are released. Additionally, conduct a thorough security review of the deployment environment, including privilege management and access controls, to minimize the impact of a potential compromise. Implementing intrusion detection systems (IDS) and endpoint detection and response (EDR) solutions can help identify and respond to exploitation attempts quickly.

Description

Unrestricted upload of dangerous file types in the C21 Live Encoder and Live Mosaic product, version 5.3. This vulnerability allows a remote attacker to upload different file extensions without any restrictions, resulting in a full system compromise.

References

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