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Fencer Intel
high 8.0

CVE-2022-27646 json

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6700v3 1.0.4.120_10.0.…

published 3y ago modified 4mo ago also EUVD-2022-32147

cvss
8.0
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 73%
public exploits
0
none known

Summary

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6700v3 1.0.4.120_10.0.91 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the circled daemon. A crafted circleinfo.txt file can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-15879.

Patch / fix

  • netgear r6400_firmware 1.0.4.126
  • netgear r6700_firmware 1.0.4.126
  • netgear r6900p_firmware 1.3.3.148
  • netgear r7000_firmware 1.0.11.134
  • netgear r7000p_firmware 1.3.3.148
  • netgear r7850_firmware 1.0.5.84
  • netgear r7960p_firmware 1.4.3.88
  • netgear r8000_firmware 1.0.4.84
  • netgear r8000p_firmware 1.4.3.88
  • netgear rax200_firmware 1.0.6.138
  • netgear rax75_firmware 1.0.6.138
  • netgear rax80_firmware 1.0.6.138
  • netgear rs400_firmware 1.5.1.86
  • netgear cbr40_firmware 2.5.0.28
  • netgear lbr1020_firmware 2.7.4.2
  • netgear lbr20_firmware 2.7.4.2
  • netgear rbr10_firmware 2.7.4.24
  • netgear rbr20_firmware 2.7.4.24
  • netgear rbr40_firmware 2.7.4.24
  • netgear rbr50_firmware 2.7.4.24

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last yr.

Exploit prediction

1.43% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 8.0 CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • NETGEAR R6700v3

Classification

Weakness
  • CWE-121 Stack-based Buffer Overflow

References

Sources

Fencer Intel 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.