What is CVE-2026-20357?

CVE-2026-20357 is a critical-severity vulnerability in Cisco Crosswork Planning, classified under Missing Authentication for Critical Function. CVSS score: 10.0/10. Published 2026-08-19.

How severe is CVE-2026-20357?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Auth bypass in Cisco Crosswork Planning

CVE-2026-20357

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Crosswork engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20357 are related to missing authentication for critical function issues that are grouped under the Common Weakness Enumeration (CWE) CWE-306.

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Cisco Crosswork Planning — versions 7.0.0, 7.0.1, 7.0.2

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

Frequently asked questions

What is CVE-2026-20357?: CVE-2026-20357 is a critical-severity vulnerability in Cisco Crosswork Planning, classified under Missing Authentication for Critical Function. CVSS score: 10.0/10. Published 2026-08-19.
How severe is CVE-2026-20357?: Critical severity. CVSS v3 base score is 10.0 out of 10.