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.
The severity of this vulnerability is classified as high, with a CVSS score of 8.8. This indicates a significant risk to organizations, as attackers may leverage this vulnerability to gain unauthorized access and control over critical systems.
Organizations should prioritize patching immediately, as this vulnerability poses a substantial threat if exploited. The lack of a known exploit does not mitigate the need for prompt remediation.
The publication date of the vulnerability is February 25, 2026. Organizations using affected versions of Cisco Catalyst SD-WAN Manager should take immediate action to address this vulnerability.
Vulnerability Details
The vulnerability is classified under CWE-648, indicating that it stems from insufficient user authentication mechanisms. The affected product is Cisco Catalyst SD-WAN Manager, with versions vulnerable to this issue being those prior to 20.9.8.2, between 20.11 and 20.12.5.3, between 20.13 and 20.15.4.2, and between 20.16 and 20.18.2.1, as well as version 20.12.6.
Technical Analysis
The root cause of this vulnerability lies in the insufficient authentication mechanism utilized by the REST API. The attack vector is via the network, and the attack complexity is rated as low, which means that an attacker with basic knowledge could exploit this vulnerability. The attacker requires low privileges, and no user interaction is needed, which increases the risk of exploitation.
In terms of impact, if exploited, attackers could achieve a high impact on confidentiality, integrity, and availability. This emphasizes the critical nature of addressing this vulnerability promptly.
Risk & Impact Analysis
Risk to organizations includes unauthorized access to sensitive systems and potential data breaches. The high CVSS score indicates that the vulnerability can be exploited easily, leading to severe repercussions for organizations that do not act swiftly. Organizations must understand the potential blast radius of this vulnerability and the urgency tied to its remediation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Affected versions of Cisco Catalyst SD-WAN Manager include those prior to 20.9.8.2, between 20.11 and 20.12.5.3, between 20.13 and 20.15.4.2, and between 20.16 and 20.18.2.1, along with version 20.12.6.
Mitigation & Remediation
Organizations should prioritize patching immediately by upgrading to the latest version of Cisco Catalyst SD-WAN Manager. If a patch is unavailable, organizations should implement configuration hardening and network controls to limit access to the REST API. Continuous monitoring for unusual activity should also be established to detect any unauthorized access attempts.
Detection Guidance
Monitoring logs for unusual authentication patterns, failed access attempts to the REST API, and any changes to user privileges can help in detecting exploitation attempts. Behavioral anomalies in system access patterns should also be closely observed.
AppSecure Threat Intelligence Insight
This vulnerability highlights an ongoing trend in the security landscape where insufficient authentication mechanisms remain a critical weakness. Security teams must learn from this incident and prioritize robust authentication methods in their systems. Continuous assessments and improvements in security practices are essential to mitigate similar vulnerabilities in the future.
For organizations looking to strengthen their security posture, engaging in comprehensive security assessments is recommended. These assessments can uncover vulnerabilities and provide a roadmap for effective remediation strategies. Organizations should also consider implementing application security assessments to ensure their systems are resilient against potential exploits.
In conclusion, organizations must remain vigilant and proactive in their security measures to safeguard against vulnerabilities such as CVE-2026-20126.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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