Is CVE-2020-28877 actively exploited?

No active exploitation of CVE-2020-28877 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-28877 be exploited remotely?

Yes. CVE-2020-28877 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-28877?

CVE-2020-28877 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2020-28877

CRITICAL

CVE-2020-28877

CWE-120Published: November 20, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Buffer overflow in in the copy_msg_element function for the devDiscoverHandle server in the TP-Link WR and WDR series, including WDR7400, WDR7500, WDR7660, WDR7800, WDR8400, WDR8500, WDR8600, WDR8620, WDR8640, WDR8660, WR880N, WR886N, WR890N, WR890N, WR882N, and WR708N.

NVD Source

Technical Analysis

CVE-2020-28877 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.