CVE-2020-3209

MEDIUM

Cisco IOS XE - Unauthenticated Digital Signature Verification Bypass

Title source: llm
STIX 2.1

Description

A vulnerability in software image verification in Cisco IOS XE Software could allow an unauthenticated, physical attacker to install and boot a malicious software image or execute unsigned binaries on an affected device. The vulnerability is due to an improper check on the area of code that manages the verification of the digital signatures of system image files during the initial boot process. An attacker could exploit this vulnerability by loading unsigned software on an affected device. A successful exploit could allow the attacker to install and boot a malicious software image or execute unsigned binaries on the targeted device.

References (1)

Core 1
Core References

Scores

CVSS v3 6.8
EPSS 0.0004
EPSS Percentile 14.2%
Attack Vector PHYSICAL
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-347
Status published
Products (50)
cisco/ios_xe 3.2.0se
cisco/ios_xe 3.2.0sg
cisco/ios_xe 3.2.1se
cisco/ios_xe 3.2.1sg
cisco/ios_xe 3.2.2se
cisco/ios_xe 3.2.2sg
cisco/ios_xe 3.2.3se
cisco/ios_xe 3.2.3sg
cisco/ios_xe 3.2.4sg
cisco/ios_xe 3.2.5sg
... and 40 more
Published Jun 03, 2020
Tracked Since Feb 18, 2026