CriticalCVECISA — Known Exploited Vulnerabilities· 23 Oct 2023

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

Severity: Critical · Kind: Vulnerability

Plain-English summary on the way

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From the source

Cisco Cisco IOS XE Web UI. 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: 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.

Vulnerability facts

CVE: CVE-2023-20273
On CISA KEV since: 2023-10-23
Ransomware use: Unknown

Read the original advisory →← All threat intel

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Plain-English summaries are AI-generated and reviewed for tone, not technical accuracy. For incident response, always rely on the original source linked above.