CVE-2021-42071
CVE-2021-42071 is a critical-severity vulnerability in Visual-tools Dvr Vx16 Firmware with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 70% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 10.0
- EPSS exploit prediction: 70% (99th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-78
- Affected product: Visual-tools Dvr Vx16 Firmware
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2021-42071?
- 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.
- How severe is CVE-2021-42071?
- CVE-2021-42071 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-42071 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 70% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-42071?
- CVE-2021-42071 affects Visual-tools Dvr Vx16 Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-42071?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-42071 published?
- CVE-2021-42071 was published on 2021-10-07 and last updated on 2026-06-17.
References
- https://visual-tools.com/
- https://www.exploit-db.com/exploits/50098
- https://www.swascan.com/security-advisory-visual-tools-dvr-cve-2021-42071/
Affected products (1)
- cpe:2.3:o:visual-tools:dvr_vx16_firmware:4.2.28.0:*:*:*:*:*:*:*
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