critical
9.8
Advisory Published
Updated

CVE-2021-40866

First published: Mon Sep 13 2021(Updated: )

Certain NETGEAR smart switches are affected by a remote admin password change by an unauthenticated attacker via the (disabled by default) /sqfs/bin/sccd daemon, which fails to check authentication when the authentication TLV is missing from a received NSDP packet. 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.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Netgear Gc108p Firmware<1.0.8.2
Netgear Gc108p
Netgear Gc108pp Firmware<1.0.8.2
Netgear Gc108pp
Netgear Gs108t Firmware<7.0.7.2
Netgear Gs108tv3
Netgear Gs110tpp Firmware<7.0.7.2
Netgear Gs110tpp
Netgear Gs110tp Firmware<7.0.7.2
Netgear Gs110tp=v3
Netgear Gs110tup Firmware<1.0.5.3
Netgear Gs110tup
Netgear Gs308t Firmware<1.0.3.2
Netgear Gs308t
Netgear Gs310tp Firmware<1.0.3.2
Netgear Gs310tp
Netgear Gs710tup Firmware<1.0.5.3
Netgear Gs710tup
Netgear Gs716tp Firmware<1.0.4.2
Netgear Gs716tp
Netgear Gs716tpp Firmware<1.0.4.2
Netgear Gs716tpp
Netgear Gs724tpp Firmware<2.0.6.3
Netgear Gs724tpp
Netgear Gs724tp Firmware<2.0.6.3
Netgear Gs724tp=v2
Netgear Gs728tpp Firmware<6.0.8.2
Netgear Gs728tpp=v2
Netgear Gs728tp Firmware<6.0.8.2
Netgear Gs728tp=v2
Netgear Gs750e Firmware<1.0.1.10
Netgear Gs750e
Netgear Gs752tpp Firmware<6.0.8.2
Netgear Gs752tpp
Netgear Gs752tp Firmware<6.0.8.2
Netgear Gs752tp=v2
Netgear Ms510txm Firmware<1.0.4.2
Netgear Ms510txm
Netgear Ms510txup Firmware<1.0.4.2
Netgear Ms510txup

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-40866?

    CVE-2021-40866 is a vulnerability in certain NETGEAR smart switches that allows an unauthenticated attacker to remotely change the admin password.

  • How does CVE-2021-40866 affect NETGEAR smart switches?

    CVE-2021-40866 affects certain NETGEAR smart switches by allowing an unauthenticated attacker to change the admin password remotely.

  • Which versions of NETGEAR smart switches are affected by CVE-2021-40866?

    Versions of NETGEAR smart switches GC108P and GC108PP before 1.0.8.2 are affected by CVE-2021-40866.

  • How severe is CVE-2021-40866?

    CVE-2021-40866 has a severity rating of 8.8 (critical).

  • Where can I find more information about CVE-2021-40866?

    You can find more information about CVE-2021-40866 in the following references: [link1](https://gynvael.coldwind.pl/?id=740), [link2](https://kb.netgear.com/000063978/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Smart-Switches-PSV-2021-0140-PSV-2021-0144-PSV-2021-0145).

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