CVSS-10
Cisco Catalyst SD-WAN CVE-2026-20182: Second vdaemon Auth Bypass Lands in CISA KEV
Cisco patched a CVSS 10.0 auth bypass in Catalyst SD-WAN Controller's vdaemon service. UAT-8616 is already exploiting it. CISA added it to KEV May 15 with a May 17 deadline.
Ni8mare: CVSS 10.0 Unauthenticated RCE in n8n Workflow Automation (CVE-2026-21858)
A CVSS 10.0 content-type confusion bug in n8n's webhook handler lets unauthenticated attackers read arbitrary files, steal credentials, forge admin sessions, and achieve full RCE. Patch to 1.121.0 immediately.
CVE-2026-20127: Cisco SD-WAN Zero-Day Exploited for Three Years Before Disclosure
UAT-8616 abused a CVSS 10.0 auth bypass in Cisco Catalyst SD-WAN Controller and Manager since 2023, inserting rogue control-plane peers and escalating to root via a deliberate version-downgrade chain. Cisco disclosed in late February.