Risk Letters

Exploited vulnerability

CVE-2023-20273

TLP:CLEAR

Cisco IOS XE Web UI Command Injection Vulnerability

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.

Facts

  • Vendor: Cisco
  • Product: Cisco IOS XE Web UI
  • CVSS: 7.2
  • EPSS (probability of exploitation within 30 days): 92.9 %
  • On CISA's Known Exploited Vulnerabilities list since: 23 October 2023
  • First known exploitation: 23 October 2023
  • CISA's deadline for US federal agencies: 27 October 2023
  • Weakness: CWE-78
  • First seen by Risk Letters: 23 October 2023

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD