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Fencer Vulns
high 8.1

CVE-2021-38527 json

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

published 2021-08-11 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-24977

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects CBR40 before 2.5.0.14, EX6100v2 before 1.0.1.98, EX6150v2 before 1.0.1.98, EX6250 before 1.0.0.132, EX6400 before 1.0.2.158, EX6400v2 before 1.0.0.132, EX6410 before 1.0.0.132, EX6420 before 1.0.0.132, EX7300 before 1.0.2.158, EX7300v2 before 1.0.0.132, EX7320 before 1.0.0.132, EX7700 before 1.0.0.216, EX8000 before 1.0.1.232, R7800 before 1.0.2.78, RBK12 before 2.6.1.44, RBR10 before 2.6.1.44, RBS10 before 2.6.1.44, RBK20 before 2.6.1.38, RBR20 before 2.6.1.36, RBS20 before 2.6.1.38, RBK40 before 2.6.1.38, RBR40 before 2.6.1.36, RBS40 before 2.6.1.38, RBK50 before 2.6.1.40, RBR50 before 2.6.1.40, RBS50 before 2.6.1.40, RBK752 before 3.2.16.6, RBR750 before 3.2.16.6, RBS750 before 3.2.16.6, RBK852 before 3.2.16.6, RBR850 before 3.2.16.6, RBS850 before 3.2.16.6, RBS40V before 2.6.2.4, RBS50Y before 2.6.1.40, RBW30 before 2.6.2.2, and XR500 before 2.3.2.114.

Patch / fix

  • netgear cbr40_firmware 2.5.0.14
  • netgear ex6100_firmware 1.0.1.98
  • netgear ex6150_firmware 1.0.1.98
  • netgear ex6250_firmware 1.0.0.132
  • netgear ex6400_firmware 1.0.0.132, 1.0.2.158
  • netgear ex6410_firmware 1.0.0.132
  • netgear ex6420_firmware 1.0.0.132
  • netgear ex7300_firmware 1.0.2.158
  • netgear ex7320_firmware 1.0.0.132
  • netgear ex7700_firmware 1.0.0.216
  • netgear ex8000_firmware 1.0.1.232
  • netgear r7800_firmware 1.0.2.78
  • netgear rbk12_firmware 2.6.1.44
  • netgear rbr10_firmware 2.6.1.44
  • netgear rbs10_firmware 2.6.1.44
  • netgear rbk20_firmware 2.6.1.38
  • netgear rbr20_firmware 2.6.1.36
  • netgear rbs20_firmware 2.6.1.38
  • netgear rbk40_firmware 2.6.1.38
  • netgear rbr40_firmware 2.6.1.36

Exploit prediction

1.69% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AC:L/AV:A/A:N/C:H/I:H/PR:N/S:U/UI:N
CNA 3.1 8.1 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
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-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.