CVE-2020-27865 Auth bypass in DAP-1860

High 8.8 Published 11 Feb 2021 Updated 4 Aug 2024

Network-adjacent attackers can bypass authentication on D-Link WiFi extenders to execute arbitrary code and escalate privileges.

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

What is CVE-2020-27865?

CVE-2020-27865 is a high-severity authentication bypass vulnerability in D-Link DAP-1860, published on 11 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-1860 firmware version 1.04B03 WiFi extenders. Authentication is not required to exploit this vulnerability. The specific flaw exists within the uhttpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the device. Was ZDI-CAN-10894.

Weakness: CWE-287, CWE-288

Which versions are affected by CVE-2020-27865?

It affects 1 product.

Products include Dlink Dap-1860 Firmware.

How do I fix CVE-2020-27865?

No fix has been published for CVE-2020-27865 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2020-27865 being exploited?

There is no known exploitation of CVE-2020-27865 in the wild and no public exploit code.

Sources

Also known as GHSA-m62g-m4j3-92fg.