What’s Vulnerable › Vulnerabilities

CVE-2021-1259: Cisco SD-WAN vManage Software Path Traversal Vulnerability

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-20 · updated 2026-06-17
• Weakness: CWE-22

Description

A vulnerability in the web-based management interface of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to conduct path traversal attacks and obtain write access to sensitive files on an affected system. The vulnerability is due to insufficient validation of HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request that contains directory traversal character sequences to an affected system. A successful exploit could allow the attacker to write arbitrary files on the affected system.

Affected products

• Cisco Sd-Wan Vmanage: before 18.2.0 — fixed in 18.2.0

How to fix

Upgrade to a fixed version: Cisco Sd-Wan Vmanage 18.2.0. Check the vendor advisory for mitigations.

References

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vman-pathtrav-Z5mCVsjf
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vman-pathtrav-Z5mCVsjf

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