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

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.
More from Eduard Kovacs
- ICS Cybersecurity Firm Opscura Launches With $9.4 Million in Series A Funding
- Patch Released for Actively Exploited GoAnywhere MFT Zero-Day
- VMware Says No Evidence of Zero-Day Exploitation in ESXiArgs Ransomware Attacks
- Critical Baicells Device Vulnerability Can Expose Telecoms Networks to Snooping
- SecurityWeek Analysis: Over 450 Cybersecurity M&A Deals Announced in 2022
- VMware ESXi Servers Targeted in Ransomware Attack via Old Vulnerability
- High-Severity Privilege Escalation Vulnerability Patched in VMware Workstation
- GoAnywhere MFT Users Warned of Zero-Day Exploit
Latest News
- OpenSSL Ships Patch for High-Severity Flaws
- Software Supply Chain Security Firm Lineaje Raises $7 Million
- ICS Cybersecurity Firm Opscura Launches With $9.4 Million in Series A Funding
- Vulnerability Provided Access to Toyota Supplier Management Network
- Patch Released for Actively Exploited GoAnywhere MFT Zero-Day
- Linux Variant of Cl0p Ransomware Emerges
- VMware Says No Evidence of Zero-Day Exploitation in ESXiArgs Ransomware Attacks
- Comcast Wants a Slice of the Enterprise Cybersecurity Business
