A vulnerability in Cisco Catalyst SD-WAN Software could allow an unauthenticated, remote attacker to view sensitive information on an affected system. This vulnerability is due to insufficient file system restrictions. An authenticated attacker with netadmin privileges could exploit this vulnerability by accessing the vshell of an affected system. A successful exploit could allow the attacker to read sensitive information on the underlying operating system.
The CVSS score of 6.5 indicates a medium severity level, suggesting that organizations should address this vulnerability in their priority patch cycle. The potential for unauthorized access to sensitive information poses significant risks to organizations, making it imperative to remediate this issue promptly.
Currently, no public exploit has been identified, but the vulnerability is included in the Known Exploited Vulnerabilities (KEV) catalog. Organizations should prioritize patching immediately due to the exposure of sensitive information that could be leveraged by attackers.
To mitigate this vulnerability, it is crucial for security teams to follow the recommended guidelines provided by Cisco and CISA. Organizations must evaluate their exposure and implement necessary updates to safeguard against potential exploitation.
Vulnerability Details
CVE-2026-20133 is classified under CWE-200, which pertains to the exposure of sensitive information. The vulnerability was published on February 25, 2026, and affects Cisco Catalyst SD-WAN Manager across specific versions. The attack vector is network-based, requiring low complexity and low privileges for exploitation.
The CVSS score from NVD is 7.5 (high severity), which emphasizes the need for immediate attention by organizations utilizing affected systems. The vulnerability could lead to high confidentiality impact, allowing unauthorized access to sensitive data.
Technical Analysis
The root cause of this vulnerability lies in insufficient file system restrictions within the Cisco Catalyst SD-WAN platform. Attackers may leverage this flaw remotely via the network, with low complexity and no user interaction required. The attack does not require high privileges, thereby making it accessible to unauthorized users.
The confidentiality impact is rated as high, indicating that sensitive information can be exposed, while integrity and availability impacts are rated as none. Organizations must monitor their systems for potential unauthorized access attempts.
Risk & Impact Analysis
Risk to organizations includes significant exposure of sensitive information, which could lead to data breaches and compliance failures. Given the potential for unauthorized access, the blast radius of an exploit could affect multiple systems if not mitigated promptly. Organizations must prioritize patching immediately to prevent exploitation of this vulnerability.
The urgency for remediation is high, and organizations should integrate this vulnerability into their incident response and patch management processes.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The following versions of Cisco Catalyst SD-WAN Manager are affected: All versions prior to vendor patch, specifically versions 20.9.8.2, 20.10 to 20.12.5.3, 20.13 to 20.15.4.2, and 20.16 to 20.18.2.1.
Mitigation & Remediation
Organizations must apply the latest patches provided by Cisco to remediate this vulnerability. For version updates, refer to the recommended guidelines and ensure that systems are configured according to security best practices. Further guidance can be found in the CISA’s Emergency Directive 26-03.
Continuous penetration testing should be conducted to assess for further vulnerabilities and ensure the overall security posture of the system.
Detection Guidance
Organizations should monitor logs for unauthorized access attempts, especially targeting the vshell. Behavioral anomalies consistent with unauthorized information access should also be investigated. Network signatures indicative of exploitation attempts should be established.
AppSecure Threat Intelligence Insight
This vulnerability highlights the ongoing need for organizations to maintain robust security measures for their network devices. Security teams should remain vigilant and adopt a proactive stance towards vulnerabilities. Continuous monitoring and implementing best practices are essential to mitigate risks effectively.
Vulnerability management programs should be designed to incorporate findings from incidents like CVE-2026-20133 to fortify defenses.
Penetration testing methodologies should be routinely updated to reflect new vulnerabilities and threat landscapes.
API security testing is crucial for identifying weaknesses in network services, especially for products like Cisco Catalyst SD-WAN.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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