CVE-2026-20359 concerns insufficiently protected credentials in Cisco Crosswork Planning, identified during Cisco's internal security review. The vulnerability falls under CWE-522, which involves weaknesses in credential storage or protection. This flaw could allow attackers with limited privileges to compromise credentials, leading to significant confidentiality, integrity, and availability impacts. Cisco released a software hardening update to address this and other internally discovered vulnerabilities. The affected versions explicitly include 7.0.0, 7.0.1, 7.0.2, 7.0.3, 7.0.4, 7.1.0, 7.1.1, 7.1.2, and 7.2.0.

The vulnerability allows attackers to potentially access or compromise credentials that are insufficiently protected, which can lead to full compromise of the affected system's confidentiality, integrity, and availability. The CVSS score of 9.9 reflects the critical nature of this issue, indicating that exploitation could have severe consequences for affected Cisco Crosswork Planning deployments.

Cisco has released a software hardening update that addresses CVE-2026-20359 along with other vulnerabilities discovered during their internal review. Users should apply the official Cisco patches or updates corresponding to their affected versions to remediate this issue. Since this is not a cloud service, remediation depends on applying these updates. No alternative mitigations or workarounds are indicated in the available data.