Vulnerability Monitor

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CVE-2026-20126


A vulnerability in Cisco Catalyst SD-WAN Manager could allow an authenticated, local attacker with low privileges to gain root privileges on the underlying operating system. This vulnerability is due to an insufficient user authentication mechanism in the REST API. An attacker could exploit this vulnerability by sending a request to the REST API of the affected system. A successful exploit could allow the attacker to gain root privileges on the underlying operating system.


Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 1 product from cisco organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2026, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2026-02-25T17:25:28.840

Last Modified

2026-03-04T21:21:49.053

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

Weaknesses
  • Type: Primary
    CWE-648

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application cisco catalyst_sd-wan_manager < 20.9.8.2 Yes
Application cisco catalyst_sd-wan_manager < 20.12.5.3 Yes
Application cisco catalyst_sd-wan_manager < 20.15.4.2 Yes
Application cisco catalyst_sd-wan_manager < 20.18.2.1 Yes
Application cisco catalyst_sd-wan_manager 20.12.6 Yes

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.