CVE-2021-34202 Memory corruption in n/a

High 7.8 Published 16 Jun 2021 Updated 9 Jul 2026

Out-of-bounds vulnerabilities in D-Link AC2600 routers allow local attackers to escalate privileges to administrator and execute arbitrary code.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-34202?

CVE-2021-34202 is a high-severity memory corruption vulnerability in n/a, published on 16 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

There are multiple out-of-bounds vulnerabilities in some processes of D-Link AC2600(DIR-2640) 1.01B04. Ordinary permissions can be elevated to administrator permissions, resulting in local arbitrary code execution. An attacker can combine other vulnerabilities to further achieve the purpose of remote code execution.

Weakness: CWE-787

Which versions are affected by CVE-2021-34202?

It affects 1 product.

Products include Dlink Dir-2640-Us Firmware.

How do I fix CVE-2021-34202?

No fix has been published for CVE-2021-34202 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-34202 being exploited?

There is no known exploitation of CVE-2021-34202 in the wild and no public exploit code.

Sources

Also known as GHSA-rm56-645j-pf84.