CVE-2021-42071
In Visual Tools DVR VX16 4.2.28.0, an unauthenticated attacker can achieve remote command...
In Visual Tools DVR VX16 4.2.28.0, an unauthenticated attacker can achieve remote command execution via shell metacharacters in the cgi-bin/slogin/login.py User-Agent HTTP header.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
In Visual Tools DVR VX16 4.2.28.0, an unauthenticated attacker can achieve remote command execution via shell metacharacters in the cgi-bin/slogin/login.py User-Agent HTTP header.
- Record
CVE-2021-42071- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-78
- Updated
- 2026-11-02
CVE List No score
In Visual Tools DVR VX16 4.2.28.0, an unauthenticated attacker can achieve remote command execution via shell metacharacters in the cgi-bin/slogin/login.py User-Agent HTTP header.
- Record
CVE-2021-42071- Updated
- 2026-11-02
EUVDEUVD-2021-29057 No score
In Visual Tools DVR VX16 4.2.28.0, an unauthenticated attacker can achieve remote command execution via shell metacharacters in the cgi-bin/slogin/login.py User-Agent HTTP header.
- Record
EUVD-2021-29057- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5pjx-33j8-9h49 No score
In Visual Tools DVR VX16 4.2.28.0, an unauthenticated attacker can achieve remote command...
In Visual Tools DVR VX16 4.2.28.0, an unauthenticated attacker can achieve remote command execution via shell metacharacters in the cgi-bin/slogin/login.py Uaer-Agent HTTP header.
- Record
GHSA-5pjx-33j8-9h49- Weakness
- CWE-78
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Visual Tools DVR VX16 4.2.28.0 - OS Command Injection (Unauthenticated) | 2021-07-06 |
| Nuclei | Visual Tools DVR VX16 4.2.28.0 - Unauthenticated OS Command Injection |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, Nuclei, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-42071 is a critical vulnerability (CVSS 9.8) in Visual-tools Dvr Vx16 Firmware, published October 7, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 69.9%, the 99th percentile. No source names a fixed version.