CVE-2019-16009: Cisco IOS and Cisco IOS XE Software Web UI Cross-Site Request Forgery Vulnerability

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-09-23 · updated 2026-06-17
Weakness: CWE-352

Description

A vulnerability in the web UI of Cisco IOS and Cisco IOS XE Software could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack on an affected system. The vulnerability is due to insufficient CSRF protections for the web UI on an affected device. An attacker could exploit this vulnerability by persuading a user of the interface to follow a malicious link. A successful exploit could allow the attacker to perform arbitrary actions with the privilege level of the targeted user. If the user has administrative privileges, the attacker could alter the configuration, execute commands, or reload an affected device.

Affected products

Cisco IOS: before 16.1.1 — fixed in 16.1.1
Cisco IOS XE: before 16.1.1 — fixed in 16.1.1

How to fix

Upgrade to a fixed version: Cisco IOS 16.1.1; Cisco IOS XE 16.1.1. Check the vendor advisory for mitigations.

References

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