CVE-2018-0434: Cisco SD-WAN Solution Certificate Validation Vulnerability

Severity: high (CVSS 7.4 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-10-05 · updated 2026-06-17
Weakness: CWE-295

Description

A vulnerability in the Zero Touch Provisioning feature of the Cisco SD-WAN Solution could allow an unauthenticated, remote attacker to gain unauthorized access to sensitive data by using an invalid certificate. The vulnerability is due to insufficient certificate validation by the affected software. An attacker could exploit this vulnerability by supplying a crafted certificate to an affected device. A successful exploit could allow the attacker to conduct man-in-the-middle attacks to decrypt confidential information on user connections to the affected software.

Affected products

Cisco Vedge 1000 Firmware: before 18.3.0 — fixed in 18.3.0
Cisco Vedge 100 Firmware: before 18.3.0 — fixed in 18.3.0
Cisco Vedge 2000 Firmware: before 18.3.0 — fixed in 18.3.0
Cisco Vedge 5000 Firmware: before 18.3.0 — fixed in 18.3.0
Cisco Vmanage Network Management System: all versions

How to fix

Upgrade to a fixed version: Cisco Vedge 1000 Firmware 18.3.0; Cisco Vedge 100 Firmware 18.3.0; Cisco Vedge 2000 Firmware 18.3.0; Cisco Vedge 5000 Firmware 18.3.0. Check the vendor advisory for mitigations.

References

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