UAT-11473

crimewarevia MISP

1 CVE attributed

Highly sophisticated APT reported and named by Cisco Talos that exploited CVE-2026-20127, an authentication bypass in Cisco SD-WAN Catalyst Controller, to gain unauthorized access and install the custom KeyDrift malware framework (PolyFlame, LittleFilch), designed for long-term persistent access and automated exfiltration of sensitive keying material from SD-WAN control-plane processes. Observed targeting spans space and satellite services, defense and aerospace technology, and policy research. Talos assesses with high confidence that UAT-11473's operating infrastructure overlaps considerably with Volt Typhoon's Silent Train covert access network; this infrastructure overlap is the only link Talos reports between the two.

Attributed CVEs1

CVE	Description	Severity	EPSS	Flags	Modified
CVE-2026-20127	A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system. This vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric.	CRITICAL10.0	89%p100	KEVFunctional	2026-06-17