CVE-2021-42071 in the critical feed json
In Visual Tools DVR VX16 4.2.28.0, an unauthenticated attacker can achieve remote command execution via shell metacharacters in the cgi-bin…
published 2021-10-07 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-29057
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 69.9%
- EPSS 69.9% chance of exploitation in 30 days, percentile 99.3%
- public exploits
- 1
- Exploit-DB, plus a Nuclei check
Summary
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.
Timeline
- First public exploit (EDB-50098)
- Published
Exploit prediction
69.88% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-50098 Visual Tools DVR VX16 4.2.28.0 - OS Command Injection (Unauthenticated) webapps, 2021-07-06
- Nuclei template Visual Tools DVR VX16 4.2.28.0 - Unauthenticated OS Command Injection nuclei detection template
- swascan.com https://www.swascan.com/security-advisory-visual-tools-dvr-cve-2021-42071/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-78 Improper Neutralization of Special Elements used in an OS Command
References
-
exploit-db.com
/exploits/50098
exploit, third-party-advisory, vdb-entry
-
swascan.com
/security-advisory-visual-tools-dvr-cve-2021-42071/
exploit, third-party-advisory
-
visual-tools.com
/
vendor-advisory
Sources
- CVE List CVE-2021-42071
- NVD CVE-2021-42071
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.