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Vulnerabilities

Vulnerability · CVE-2021-47799

Visual Tools DVR VX16 version 4.2.28 contains a local privilege escalation vulnerability in its Sudo configuration that allows attackers to gain root access.

Published Jan 15, 2026 · catalog updated Jul 28, 2026 · Visual-Tools Visual Tools DVR VX16

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2021-47799. EPSS is 0.14%. Act only if a listed version of Visual-Tools Visual Tools DVR VX16 is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.14%
Remediation
Vendor / distro source
Affected products
vendor Visual-Tools Visual Tools DVR VX16 Visual Tools VX16 4.2.28.0

Visual Tools DVR VX16 version 4.2.28 contains a local privilege escalation vulnerability in its Sudo configuration that allows attackers to gain root access. Attackers can exploit the unsafe Sudo settings by using mount commands to bind a shell, enabling unauthorized system-level privileges.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Visual-Tools Visual Tools DVR VX16 Visual Tools VX16 4.2.28.0Visual Tools VX16 4.2.28.0

How to fix CVE-2021-47799

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2021-47799. EPSS is 0.14%. Act only if a listed version of Visual-Tools Visual Tools DVR VX16 is installed.

Which versions are affected?

Compare what you have installed with Visual-Tools Visual Tools DVR VX16 Visual Tools VX16 4.2.28.0 Visual Tools VX16 4.2.28.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.14%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 15, 2026 · EUVD

    Detected

    Visual Tools DVR VX16 version 4.2.28 contains a local privilege escalation vulnerability in its Sudo configuration that allows attackers to gain root access. Attackers can exploit the unsafe Sudo settings by using mount commands to bind a shell, enabling unauthorized system-level privileges.

  2. Jul 28, 2026 · EUVD

    Updated

    Visual Tools DVR VX16 version 4.2.28 contains a local privilege escalation vulnerability in its Sudo configuration that allows attackers to gain root access. Attackers can exploit the unsafe Sudo settings by using mount commands to bind a shell, enabling unauthorized system-level privileges.

Sources

  • CVE.orgVulnerability recordCVE-2021-47799

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-47799

    30-day exploitation probability 0.14%

    first.org
  • EUVDVulnerability recordEUVD-2026-2754

    Visual Tools DVR VX16 version 4.2.28 contains a local privilege escalation vulnerability in its Sudo configuration that allows attackers to gain root access. Attackers can exploit the unsafe Sudo settings by using mount commands to bind a shell, enabling unauthorized system-level

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 29, 2026
  • FIRST EPSSOct 29, 2026
  • EUVDOct 29, 2026