CVE-2021-40867

HIGH
7.1
CVSS Score
Published: September 13, 2021 at 07:17 AM UTC
Updated: June 17, 2026 at 04:07 AM UTC
40 products affected across 1 vendorGS752TPP FirmwareGS724TPP FirmwareGS752TP Firmware

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Severity
HIGH7.1
Exploit prediction
EPSS 1%

Description

Certain NETGEAR smart switches are affected by an authentication hijacking race-condition vulnerability by an unauthenticated attacker who uses the same source IP address as an admin in the process of logging in (e.g., behind the same NAT device, or already in possession of a foothold on an admin's machine). This occurs because the multi-step HTTP authentication process is effectively tied only to the source IP address. This affects GC108P before 1.0.8.2, GC108PP before 1.0.8.2, GS108Tv3 before 7.0.7.2, GS110TPP before 7.0.7.2, GS110TPv3 before 7.0.7.2, GS110TUP before 1.0.5.3, GS308T before 1.0.3.2, GS310TP before 1.0.3.2, GS710TUP before 1.0.5.3, GS716TP before 1.0.4.2, GS716TPP before 1.0.4.2, GS724TPP before 2.0.6.3, GS724TPv2 before 2.0.6.3, GS728TPPv2 before 6.0.8.2, GS728TPv2 before 6.0.8.2, GS750E before 1.0.1.10, GS752TPP before 6.0.8.2, GS752TPv2 before 6.0.8.2, MS510TXM before 1.0.4.2, and MS510TXUP before 1.0.4.2.

Affected

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

v < 1.0.8.2
Affected range stops below 1.0.8.2, so it looks safe — our inference, not a vendor statement
netgear-gc108p (same device)
v < 1.0.8.2
Affected range stops below 1.0.8.2, so it looks safe — our inference, not a vendor statement
netgear-gc108pp (same device)
v < 7.0.7.2
Affected range stops below 7.0.7.2, so it looks safe — our inference, not a vendor statement
netgear-gs108tv3 (same device)
v < 7.0.7.2
Affected range stops below 7.0.7.2, so it looks safe — our inference, not a vendor statement
netgear-gs110tp (same device)
v < 7.0.7.2
Affected range stops below 7.0.7.2, so it looks safe — our inference, not a vendor statement
netgear-gs110tpp (same device)
v < 1.0.5.3
Affected range stops below 1.0.5.3, so it looks safe — our inference, not a vendor statement
netgear-gs110tup (same device)
v < 1.0.3.2
Affected range stops below 1.0.3.2, so it looks safe — our inference, not a vendor statement
netgear-gs308t (same device)
v < 1.0.3.2
Affected range stops below 1.0.3.2, so it looks safe — our inference, not a vendor statement
netgear-gs310tp (same device)
v < 1.0.5.3
Affected range stops below 1.0.5.3, so it looks safe — our inference, not a vendor statement
netgear-gs710tup (same device)
v < 1.0.4.2
Affected range stops below 1.0.4.2, so it looks safe — our inference, not a vendor statement
netgear-gs716tp (same device)

Remediation

No guide yet

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

CVSS

Attack Vector
ADJACENT_NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-290

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