Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| 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 | - |
References
- https://gynvael.coldwind.pl/?id=740ExploitThird Party Advisory
- https://kb.netgear.com/000063978/Security-Advisory-for-Multiple-Vulnerabilities-Vendor Advisory
- https://gynvael.coldwind.pl/?id=740ExploitThird Party Advisory
- https://kb.netgear.com/000063978/Security-Advisory-for-Multiple-Vulnerabilities-Vendor Advisory
FAQ
What is CVE-2021-40866?
CVE-2021-40866 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 wh...
How severe is CVE-2021-40866?
CVE-2021-40866 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-40866?
Check the references section above for vendor advisories and patch information. Affected products include: Netgear Gc108P Firmware, Netgear Gc108P, Netgear Gc108Pp Firmware, Netgear Gc108Pp, Netgear Gs108T Firmware.