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CVE-2023-20273: Cisco IOS XE Web UI Command Injection Vulnerability

Cisco Cisco IOS XE Web UI · in CISA KEV since 2023-10-23

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2023-10-23added to KEV

2023-10-27federal remediation due date

89.63%EPSS exploit probability (30 days) 99.8th percentile

7.2 HIGHCVSS 3.1

Unknownknown ransomware use

-2days from NVD publication to KEV

What it is

Cisco IOS XE contains a command injection vulnerability in the web user interface. When chained with CVE-2023-20198, the attacker can leverage the new local user to elevate privilege to root and write the implant to the file system. Cisco identified CVE-2023-20273 as the vulnerability exploited to deploy the implant. CVE-2021-1435, previously associated with the exploitation events, is no longer believed to be related to this activity.

Required action (CISA)

Verify that instances of Cisco IOS XE Web UI are in compliance with BOD 23-02 and apply mitigations per vendor instructions. For affected products (Cisco IOS XE Web UI exposed to the internet or to untrusted networks), follow vendor instructions to determine if a system may have been compromised and immediately report positive findings to CISA.

CWE	CWE-78
CVSS vector	`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`
NVD published	2023-10-25 (Analyzed)

Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2023-20273.json · all KEV CVEs

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