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Fencer Vulns
critical 9.8

CVE-2021-41419 json

QVIS NVR DVR before 2021-12-13 is vulnerable to Remote Code Execution via Java deserialization.

published 2022-07-17 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-28446

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
9.2%
EPSS 9.2% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known, plus a Nuclei check

Summary

QVIS NVR DVR before 2021-12-13 is vulnerable to Remote Code Execution via Java deserialization.

Patch / fix

  • qvis dvr_firmware 2021-12-13
  • qvis nvr_firmware 2021-12-13

Exploit prediction

9.19% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template QVIS NVR/DVR - Remote Code Execution nuclei detection template
  • twitter.com https://twitter.com/Me9187/status/1414904314368348163 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/projectdiscovery/nuclei-templates/blob/master/iot/qvisdvr-deserialization-rce.yaml 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

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

References

Sources

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.