CVE-2020-3237: Cisco IOx Application Framework Arbitrary File Overwrite Vulnerability

Severity: medium (CVSS 6.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-06-03 · updated 2026-06-17
Weakness: CWE-59

Description

A vulnerability in the Cisco Application Framework component of the Cisco IOx application environment could allow an authenticated, local attacker to overwrite arbitrary files in the virtual instance that is running on the affected device. The vulnerability is due to insufficient path restriction enforcement. An attacker could exploit this vulnerability by including a crafted file in an application package. An exploit could allow the attacker to overwrite files.

Affected products

Cisco IOx: before 1.9.0 — fixed in 1.9.0

How to fix

Upgrade to a fixed version: Cisco IOx 1.9.0. Check the vendor advisory for mitigations.

References

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