CVE-2021-35327 Missing authorization in n/a

Critical 9.8 Published 5 Aug 2021 Updated 4 Aug 2024

Attackers can enable Telnet and log in with default credentials via a crafted POST request, gaining unauthorized access to the router.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-35327?

CVE-2021-35327 is a critical missing authorization vulnerability in n/a, published on 5 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in TOTOLINK A720R A720R_Firmware v4.1.5cu.470_B20200911 allows attackers to start the Telnet service, then login with the default credentials via a crafted POST request.

Weakness: CWE-862

Which versions are affected by CVE-2021-35327?

It affects 1 product.

Products include Totolink A720r Firmware.

How do I fix CVE-2021-35327?

No fix has been published for CVE-2021-35327 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-35327 being exploited?

There is no known exploitation of CVE-2021-35327 in the wild and no public exploit code.

Sources

Also known as GHSA-w5cw-c968-jv2x.