Is CVE-2018-20056 actively exploited?

No active exploitation of CVE-2018-20056 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-20056 be exploited remotely?

Yes. CVE-2018-20056 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-20056?

CVE-2018-20056 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2018-20056

CRITICAL

CVE-2018-20056

CWE-787Published: December 11, 2018· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

An issue was discovered in /bin/boa on D-Link DIR-619L Rev.B 2.06B1 and DIR-605L Rev.B 2.12B1 devices. There is a stack-based buffer overflow allowing remote attackers to execute arbitrary code without authentication via the goform/formLanguageChange currTime parameter.

NVD Source

Technical Analysis

CVE-2018-20056 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.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.