CVE-2026-20359 in Crosswork Planning
Summary
by MITRE • 08/19/2026
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 trackled by CVE-2026-20359 are related to insufficiently protected credentials issues that are grouped under the Common Weakness Enumeration (CWE) CWE-522.
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Analysis
by VulDB Data Team • 08/19/2026
Cisco Crosswork, a network automation and assurance platform designed for service providers and enterprise networks, has released a software hardening update addressing several internally discovered security vulnerabilities. Among these is CVE-2026-20359, which pertains to insufficiently protected credentials within the application infrastructure. This vulnerability falls under the Common Weakness Enumeration category CWE-522, commonly known as Insufficiently Protected Credentials. The presence of such weaknesses indicates that sensitive authentication data stored or transmitted by the Crosswork system lacks adequate encryption, access controls, or integrity checks, potentially exposing user identities and session tokens to unauthorized parties if an attacker gains partial access to the underlying storage medium or network traffic.
The technical flaw associated with CVE-2026-20359 likely involves the improper handling of credentials during storage, transmission, or validation processes within the Crosswork software stack. In complex enterprise environments where Crossware manages large-scale network configurations and real-time telemetry data, credential management is critical for maintaining system integrity. If credentials are stored in plaintext, weakly hashed formats, or transmitted without robust encryption protocols such as TLS 1.2 or higher with strong cipher suites, attackers who compromise the host operating system or intercept internal service-to-service communications could extract valid login information. This aligns with ATT&CK technique T1552, specifically sub-technique T1552.004 for Unsecured Credentials, where adversaries seek to find and exploit unprotected authentication data to facilitate lateral movement or privilege escalation within the target network environment.
The operational impact of this vulnerability is significant due to the central role Crosswork plays in modern network operations centers. An attacker exploiting insufficiently protected credentials could gain unauthorized access to administrative interfaces, modify routing policies, disrupt service assurance monitoring, or exfiltrate sensitive network topology data. In a production environment, such compromise can lead to widespread service outages, regulatory non-compliance due to exposure of customer data, and erosion of trust in the automation platform’s ability to secure critical infrastructure. The risk is further amplified if Crosswork instances are integrated with other security tools or identity providers, as compromised credentials could serve as a pivot point for broader network infiltration attacks targeting high-value assets beyond the immediate scope of the Crosswork deployment.
To mitigate these risks, organizations deploying Cisco Crosswork must immediately apply the recommended software hardening release provided by Cisco Engineering. This update addresses the underlying code flaws responsible for exposing credential data and implements improved security controls aligned with industry best practices. Administrators should also enforce strict access control policies using role-based access control mechanisms to limit who can view or modify sensitive configuration files containing credentials. Additionally, ensuring that all internal communications between Crosswork components utilize mutually authenticated TLS connections reduces the attack surface for man-in-the-middle attacks aimed at credential interception. Regular auditing of authentication logs and monitoring for anomalous login patterns can help detect potential exploitation attempts early, while adherence to CIS Benchmarks for Linux or Windows hosting environments further hardens the underlying infrastructure against unauthorized access vectors related to CWE-522 weaknesses.