CVE-2026-20127

Cisco — Cisco Catalyst SD-WAN Controller and Manager Authentication Bypass Vulnerability

CISA KEV · in the CISA KEV catalog since 2026-02-25

What EVULNABLE says

EVULNABLE Risk · priority 87/100 Immediate Intelligence coverage 75/90 — no pre-patch disclosure data
Overdue by 6 monthsCISA KEVActively Exploited

Why it matters: Listed in the CISA KEV catalog, and an EPSS probability of 0.882.

Patch Immediately

The priority band answers “how soon”, not “how bad” — see Methodology for what it weighs and where it abstains.

The evidence behind it

Published measurements for CVE-2026-20127
MeasureValueSource
CVSS base score 10.0 NVD
FIRST EPSS 0.882 (99.76th pctl) FIRST
Actively exploited Confirmed CISA KEV
Ransomware campaign use Unknown or none CISA KEV
CISA remediation deadline 2026-02-27 — Overdue by 6 months CISA KEV
Intelligence coverage 75/90 — no pre-patch disclosure data

What CISA says to do

This page is an opinion about urgency. Where it and a source of record disagree, the source of record is the record.