Ethical Hacking News
Another unpatched vulnerability has been discovered in Cisco's SD-WAN software, allowing attackers to gain root privileges on vulnerable systems. As the threat landscape continues to evolve, cybersecurity professionals must remain vigilant and proactive in addressing emerging vulnerabilities.
Cisco's SD-WAN software has been affected by another unpatched vulnerability, CVE-2026-20245. The vulnerability allows authenticated local attackers to exploit the system and gain complete control over the network. The bug is a result of a validation error in the software's input validation mechanism. An attacker needs valid credentials to abuse the new hole, but exposed credentials are easy to find or buy online. This is the sixth SD-WAN vulnerability listed as under attack since the start of the year and the second zero-day in two months. Cisco's lack of timely patches raises questions about the vendor's commitment to addressing its customers' security concerns. Network administrators must take immediate action to secure their SD-WAN systems, including upgrading to the latest patch release and implementing additional security measures.
The cybersecurity landscape has become increasingly complex, with new vulnerabilities emerging on a daily basis. In recent weeks, multiple organizations have been affected by zero-day exploits in their network management systems. The latest victim is Cisco's SD-WAN software, which has been plagued by another unpatched vulnerability.
On Thursday, Cisco issued an advisory for the Catalyst SD-WAN Manager vulnerability, tracked as CVE-2026-20245. According to the company, attackers have been exploiting this security failure for at least the last week. The vulnerability affects all versions of the SD-WAN software, regardless of device configuration, and across all deployment types including on-premises, cloud-based, and FedRAMP-certified deployments.
The bug is a result of a validation error in the software's input validation mechanism. An authenticated, local attacker can exploit the flaw by uploading a specially crafted file to vulnerable systems. From there, they can escalate privileges and execute commands with root privileges. This means that an attacker who gains access to the system will have complete control over the network, allowing them to manipulate traffic, intercept sensitive data, and even conduct lateral movement within the network.
The good news is that an attacker needs valid credentials to abuse the new hole. However, exposed credentials aren't hard to find or buy online. This raises concerns about the ease with which attackers can exploit this vulnerability. In recent months, multiple SD-WAN vulnerabilities have been discovered, and several organizations have been hit by zero-day exploits.
The latest bug is the sixth SD-WAN vulnerability listed as under attack since the start of the year, and the second zero-day in two months. This highlights the ongoing struggle between cybersecurity professionals and attackers to keep pace with the ever-evolving threat landscape. It also underscores the importance of keeping software up-to-date and following best practices for network security.
The lack of timely patches from Cisco raises questions about the vendor's commitment to addressing its customers' security concerns. While Cisco has issued advisories for several SD-WAN vulnerabilities in recent months, the pace at which these have been fixed has been slower than expected. This can leave organizations with exposed networks and vulnerable systems, making them easy prey for attackers.
In light of this latest vulnerability, it is essential that network administrators take immediate action to secure their SD-WAN systems. This includes upgrading to the latest patch release, reviewing system configurations, and implementing additional security measures such as intrusion detection and prevention systems.
As the threat landscape continues to evolve, cybersecurity professionals must remain vigilant and proactive in addressing emerging vulnerabilities. By staying informed about the latest developments and taking swift action to secure their networks, organizations can minimize their risk of being exploited by malicious actors.
In conclusion, the recent discovery of another unpatched vulnerability in Cisco's SD-WAN software highlights the ongoing struggle between cybersecurity professionals and attackers to keep pace with the ever-evolving threat landscape. It is essential that network administrators take immediate action to secure their systems and stay informed about the latest developments in order to minimize their risk of being exploited by malicious actors.
Related Information:
https://www.ethicalhackingnews.com/articles/Yet-Another-SD-WAN-0-Day-Cisco-Warns-of-Unpatched-Vulnerability-ehn.shtml
https://www.theregister.com/security/2026/06/05/yet-another-cisco-sd-wan-0-day-under-attack-and-no-patch-in-sight/5251855
https://www.bleepingcomputer.com/news/security/new-cisco-sd-wan-flaw-exploited-in-zero-day-attacks-to-gain-root/
Published: Fri Jun 5 12:37:17 2026 by llama3.2 3B Q4_K_M
