Virtual Event Today: Supply Chain Security Summit - Join Event In-Progress

Security Experts:

Connect with us

Hi, what are you looking for?


Network Security

Remote Command Execution Vulnerability Affects Many D-Link Routers

Proof-of-concept (PoC) exploits were recently made public by researchers for remote command execution and information disclosure vulnerabilities affecting many D-Link routers.

Proof-of-concept (PoC) exploits were recently made public by researchers for remote command execution and information disclosure vulnerabilities affecting many D-Link routers.

Miguel Méndez Zúñiga and Pablo Pollanco of Telefónica Chile recently disclosed the details of the vulnerabilities in a couple of blog posts published on Medium. In addition to technical details and PoC code, they have posted videos showing how each of the flaws can be exploited.

According to D-Link, the company first learned of the vulnerabilities in mid-October, but its initial security advisory only listed DIR-859 routers as being affected — this was the model on which the researchers conducted their tests.

However, an updated advisory published by the company late last year shows that the vulnerabilities actually impact over a dozen D-Link DIR models, including ones that are no longer supported.

The vendor has already released firmware updates that should address the vulnerabilities for some of the impacted devices and should soon release patches for the rest of them, including for DIR-818Lx, which has reached end of life. Other affected models that have reached end of life will not receive patches.

The remote command execution vulnerability, tracked as CVE-2019-17621, is related to how UPnP requests are handled and it can allow an unauthenticated attacker to take control of vulnerable devices.

However, exploitation requires access to the local area network (LAN) housing the router, which, D-Link says, “narrows the risk of an attack considerably.”

The information disclosure flaw allows an attacker to obtain a device’s VPN configuration file, which can contain sensitive information.

Related: Flaw Gives Hackers Remote Access to Files Stored on D-Link DNS-320 Devices

Related: Credential Leaking Vulnerabilities Impact Comba, D-Link Routers

Related: No Patch for Critical Code Execution Flaw Affecting D-Link Router

Related: D-Link Patches Code Execution, XSS Flaws in Management Tool

Written By

Eduard Kovacs (@EduardKovacs) is a contributing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.

Click to comment

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts.

Join this webinar to learn best practices that organizations can use to improve both their resilience to new threats and their response times to incidents.


Join this live webinar as we explore the potential security threats that can arise when third parties are granted access to a sensitive data or systems.


Expert Insights

Related Content


Less than a week after announcing that it would suspended service indefinitely due to a conflict with an (at the time) unnamed security researcher...

Risk Management

The supply chain threat is directly linked to attack surface management, but the supply chain must be known and understood before it can be...

Application Security

Drupal released updates that resolve four vulnerabilities in Drupal core and three plugins.


Apple has released updates for macOS, iOS and Safari and they all include a WebKit patch for a zero-day vulnerability tracked as CVE-2023-23529.

Network Security

NSA publishes guidance to help system administrators identify and mitigate cyber risks associated with transitioning to IPv6.


Websites of German airports, administration bodies and banks were hit by DDoS attacks attributed to Russian hacker group Killnet

Cloud Security

VMware vRealize Log Insight vulnerability allows an unauthenticated attacker to take full control of a target system.

Identity & Access

Zero trust is not a replacement for identity and access management (IAM), but is the extension of IAM principles from people to everyone and...