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CVE-2021-34865

HIGH
8.8
CVSS Score
Published: January 25, 2022 at 03:30 PM UTC
Updated: June 17, 2026 at 03:56 AM UTC
34 products affected across 1 vendorR6800 FirmwareR6220 FirmwareR6260 Firmware

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Severity
HIGH8.8
Exploit prediction
EPSS 3%

Description

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-13313.

Affected

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

AC2100 Firmware· NETGEAR
95%
v < 1.2.0.88
Affected range stops below 1.2.0.88, so it looks safe — our inference, not a vendor statement
netgear-ac2100 (same device)
AC2400 Firmware· NETGEAR
95%
v < 1.2.0.88
Affected range stops below 1.2.0.88, so it looks safe — our inference, not a vendor statement
netgear-ac2400 (same device)
AC2600 Firmware· NETGEAR
95%
v < 1.2.0.88
Affected range stops below 1.2.0.88, so it looks safe — our inference, not a vendor statement
netgear-ac2600 (same device)
D7000V1 Firmware· NETGEAR
95%
v < 1.0.1.80
Affected range stops below 1.0.1.80, so it looks safe — our inference, not a vendor statement
netgear-d7000v1 (same device)
R6220 Firmware· NETGEAR
95%
v < 1.1.0.110
Affected range stops below 1.1.0.110, so it looks safe — our inference, not a vendor statement
netgear-r6220 (same device)
R6230 Firmware· NETGEAR
95%
v < 1.1.0.110
Affected range stops below 1.1.0.110, so it looks safe — our inference, not a vendor statement
netgear-r6230 (same device)
R6260 Firmware· NETGEAR
95%
v < 1.1.0.84
Affected range stops below 1.1.0.84, so it looks safe — our inference, not a vendor statement
netgear-r6260 (same device)
R6330 Firmware· NETGEAR
95%
v < 1.1.0.84
Affected range stops below 1.1.0.84, so it looks safe — our inference, not a vendor statement
netgear-r6330 (same device)
R6350 Firmware· NETGEAR
95%
v < 1.1.0.84
Affected range stops below 1.1.0.84, so it looks safe — our inference, not a vendor statement
netgear-r6350 (same device)
R6700V2 Firmware· NETGEAR
95%
v < 1.2.0.88
Affected range stops below 1.2.0.88, so it looks safe — our inference, not a vendor statement
netgear-r6700v2 (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)

x_refsource_MISCVendor Advisory
Source: [email protected]
https://kb.netgear.com/000063955/Security-Advisory-for-Authentication-Bypass-Vulnerability-on-Some-Routers-PSV-2021-0083?article=000063955
x_refsource_MISCThird Party AdvisoryVDB Entry
Source: [email protected]
https://www.zerodayinitiative.com/advisories/ZDI-21-1051/

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-287CWE-697

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