What’s Vulnerable › Vulnerabilities

CVE-2021-44954

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-07-18 · updated 2026-06-17

Description

In QVIS NVR DVR before 2021-12-13, an attacker can escalate privileges from a qvisdvr user to the root user by abusing a Sudo misconfiguration.

Affected products

• Qvis Dvr Firmware: before 2021-12-13 — fixed in 2021-12-13
• Qvis Nvr Firmware: before 2021-12-13 — fixed in 2021-12-13

How to fix

Upgrade to a fixed version: Qvis Dvr Firmware 2021-12-13; Qvis Nvr Firmware 2021-12-13. Check the vendor advisory for mitigations.

References

• https://gist.github.com/Meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee/a670418d51051d4e6513d86e84e8d5b8
• https://twitter.com/Me9187/status/1414906288287404039
• https://gist.github.com/Meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee/a670418d51051d4e6513d86e84e8d5b8
• https://twitter.com/Me9187/status/1414906288287404039

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