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Fencer Vulns
critical 9.6

CVE-2021-29076 json

Certain NETGEAR devices are affected by command injection by an unauthenticated attacker.

published 2021-03-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-15717

cvss
9.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects RBK852 before 3.2.17.12, RBK853 before 3.2.17.12, RBK854 before 3.2.17.12, RBR850 before 3.2.17.12, and RBS850 before 3.2.17.12.

Patch / fix

  • netgear rbk852_firmware 3.2.17.12
  • netgear rbk853_firmware 3.2.17.12
  • netgear rbk854_firmware 3.2.17.12
  • netgear rbr850_firmware 3.2.17.12
  • netgear rbs850_firmware 3.2.17.12

Exploit prediction

0.81% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.6 CVSS:3.1/AC:L/AV:A/A:H/C:H/I:H/PR:N/S:C/UI:N
CNA 3.1 9.6 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 9.6 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 5.8 AV:A/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-77 Improper Neutralization of Special Elements used in a Command

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.