Attackers Are Taking Over Cisco SD-WAN Gear

Hackers are actively exploiting a critical flaw in Cisco's Catalyst SD-WAN Manager, allowing them to gain complete control of the system.

Cisco has issued an urgent warning about a high-severity security flaw in its Catalyst SD-WAN Manager, a system used by enterprises to manage their wide-area networks. The company confirmed that this vulnerability is being actively exploited by attackers in the wild. The flaw resides in the system's command-line interface, a text-based way to interact with the software. According to the advisory, an attacker who has already gained some level of authenticated access to the device can exploit this weakness. Successfully doing so allows them to escalate their privileges to "root," the highest level of administrative control. This effectively gives the attacker complete command over the entire network management system.

The impact of this vulnerability is significant for any business using the affected Cisco product. Gaining root access to the SD-WAN Manager is equivalent to being handed the keys to the corporate network. An attacker with this level of control could intercept or redirect network traffic, eavesdrop on sensitive communications, or disable network services, causing major operational disruptions. They could also use their foothold on the management system to launch further attacks against other connected devices and servers within the organization's internal network. Because this flaw is being actively exploited, the threat is not theoretical but an immediate danger to unpatched systems.

This incident highlights a recurring security challenge for the Catalyst SD-WAN Manager platform, which has been a target for hackers multiple times in the past. The pattern underscores the importance for IT and security teams to maintain constant vigilance and a rapid patching cadence for critical network infrastructure. Cisco has released software updates to fix the vulnerability and is urging all customers to apply them as soon as possible. Failing to patch promptly leaves network infrastructure exposed to a known and active threat, risking data breaches, service outages, and significant reputational damage. The company's security advisory contains detailed information on the affected software versions and the specific patches required.