## Cisco Warns of Critical SD-WAN Zero-Day Vulnerability Under Active Exploitation
Cisco has issued a critical security warning after discovering that a previously unknown vulnerability in its SD-WAN (Software-Defined Wide Area Network) infrastructure is being actively exploited in zero-day attacks. The flaw, which affects multiple versions of Cisco's SD-WAN offerings, allows remote threat actors to compromise affected systems without requiring authentication credentials.

Security researchers tracking the campaign believe the exploits may be linked to state-sponsored hacking groups targeting enterprise telecommunications infrastructure. The vulnerability resides in the SD-WAN vManage platform's web-based management interface, where insufficient input validation enables attackers to execute arbitrary commands with elevated privileges. Organizations using Cisco's SD-WAN solution for distributed network management face immediate risk, particularly those with internet-exposed management ports.

Cisco has urged customers to apply emergency patches and implement workarounds, including restricting access to the management plane and enabling multi-factor authentication. The company is cooperating with threat intelligence partners to attribute the campaign and identify additional Indicators of Compromise (IoCs). Given the critical role SD-WAN plays in enterprise connectivity, security teams should prioritize incident response reviews and audit access logs for suspicious activity dating back to the past several weeks.
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- **Source**: Mastodon:mastodon.social:#cybersecurity
- **Sector**: The Lab
- **Tags**: cisco, sd-wan, zero-day, vulnerability, network-security
- **Credibility**: unverified
- **Published**: 2026-05-15 17:18:29
- **ID**: 83530
- **URL**: https://whisperx.ai/en/intel/83530