March 06.2026
2 Minutes Read

Cisco Catalyst SD-WAN Manager Vulnerabilities Targeting Your Security: What You Need to Know

Abstract network vulnerabilities with Cisco logo - Cisco Catalyst SD-WAN vulnerabilities

Cisco's Catalyst SD-WAN Manager Vulnerabilities Under Attack

Recent reports have confirmed that Cisco's Catalyst SD-WAN Manager is currently facing active exploitation of two critical vulnerabilities. The first, identified as CVE-2026-20122, has a CVSS score of 7.1 and allows attackers with authenticated, read-only credentials to overwrite arbitrary files on the system. The second, CVE-2026-20128, with a CVSS score of 5.5, could enable authenticated local attackers to gain privileged access to user data.

Critical Response Needed Amid Active Exploitation

In light of these vulnerabilities being actively exploited, Cisco advises users to upgrade to fixed software versions recommended through their advisories. Patches addressing multiple security flaws, including the critical CVE-2026-20127, have been made available in different version updates. Cisco is urging users to immediately implement these updates and ensure that their systems are fortified against potential threats.

Understanding the Vulnerabilities

Both CVE-2026-20122 and CVE-2026-20128 require valid credentials for exploitation, indicating that once attackers gain access to a system, they can escalate their privileges. It's pivotal for organizations to monitor their network security diligently and restrict access to trusted locations only.

The Scale of Exploitation

Ryan Dewhurst from watchTowr has reported a significant increase in exploitation attempts from numerous unique IP addresses originating from various global locations, especially in the U.S. This spike underscores the urgency of addressing these vulnerabilities proactively.

Preventative Steps for Organizations

To enhance security, it is recommended that organizations limit access from unsecured networks, secure systems behind firewalls, and monitor traffic for any anomalies. Disabling unnecessary services such as HTTP and changing default administrator passwords can also mitigate risks.

Future Threat Landscape

The nature of digital threats evolves continually, making cybersecurity a top priority for any tech-dependent organization. Active exploitation incidents like these highlight the importance of regular updates and vigilance against the backdrop of growing cybercrime.

With these vulnerabilities now in the spotlight, users must not only act swiftly to update their systems but also engage in broader cybersecurity strategies to defend against both current and future threats.

Cybersecurity Corner

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