CVE-2021-34700: Cisco SD-WAN vManage Software Information Disclosure Vulnerability

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-07-22 · updated 2026-06-17
Weakness: CWE-522

Description

A vulnerability in the CLI interface of Cisco SD-WAN vManage Software could allow an authenticated, local attacker to read arbitrary files on the underlying file system of an affected system. This vulnerability exists because access to sensitive information on an affected system is not sufficiently controlled. An attacker could exploit this vulnerability by gaining unauthorized access to sensitive information on an affected system. A successful exploit could allow the attacker to create forged authentication requests and gain unauthorized access to the web UI of an affected system.

Affected products

Cisco Catalyst SD-WAN Manager: from 20.5.0 before 20.5.1 — fixed in 20.5.1
Cisco Sd-Wan Vmanage: before 20.4.2 — fixed in 20.4.2

How to fix

Upgrade to a fixed version: Cisco Catalyst SD-WAN Manager 20.5.1; Cisco Sd-Wan Vmanage 20.4.2. Check the vendor advisory for mitigations.

References

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