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CVE-2022-27646

HIGH
8.8
CVSS Score
Published: March 29, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 04:37 AM UTC
49 products affected across 1 vendorR6700 FirmwareR7000P FirmwareR7000 Firmware

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Severity
HIGH8.8
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

CBR40 Firmware· NETGEAR
95%
v < 2.5.0.28
Affected range stops below 2.5.0.28, so it looks safe — our inference, not a vendor statement
netgear-cbr40 (same device)
LBR1020 Firmware· NETGEAR
95%
v < 2.7.4.2
Affected range stops below 2.7.4.2, so it looks safe — our inference, not a vendor statement
netgear-lbr1020 (same device)
LBR20 Firmware· NETGEAR
95%
v < 2.7.4.2
Affected range stops below 2.7.4.2, so it looks safe — our inference, not a vendor statement
netgear-lbr20 (same device)
R6400 Firmware· NETGEAR
95%
v < 1.0.4.126
Affected range stops below 1.0.4.126, so it looks safe — our inference, not a vendor statement
R6700 Firmware· NETGEAR
95%
v < 1.0.4.126
Affected range stops below 1.0.4.126, so it looks safe — our inference, not a vendor statement
netgear-r6700 (same device)
R6900P Firmware· NETGEAR
95%
v < 1.3.3.148
Affected range stops below 1.3.3.148, so it looks safe — our inference, not a vendor statement
R7000 Firmware· NETGEAR
95%
v < 1.0.11.134
Affected range stops below 1.0.11.134, so it looks safe — our inference, not a vendor statement
netgear-r7000 (same device)
R7000P Firmware· NETGEAR
95%
v < 1.3.3.148
Affected range stops below 1.3.3.148, so it looks safe — our inference, not a vendor statement
netgear-r7000p (same device)
R7850 Firmware· NETGEAR
95%
v < 1.0.5.84
Affected range stops below 1.0.5.84, so it looks safe — our inference, not a vendor statement
netgear-r7850 (same device)
R7960P Firmware· NETGEAR
95%
v < 1.4.3.88
Affected range stops below 1.4.3.88, so it looks safe — our inference, not a vendor statement
netgear-r7960p (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: [email protected]
https://kb.netgear.com/000064721/Security-Advisory-for-Multiple-Vulnerabilities-on-Multiple-Products-PSV-2021-0324
Third Party AdvisoryVDB Entry
Source: [email protected]
https://www.zerodayinitiative.com/advisories/ZDI-22-523/

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGH[email protected]
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-121

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