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CVE-2023-20273 Cisco CVE debrief

CVE-2023-20273 is a Cisco IOS XE Web UI command injection vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2023-10-23, with a remediation due date of 2023-10-27. Because CISA placed it in KEV, defenders should treat it as an urgent exposure review item, especially for systems exposed to the internet or other untrusted networks.

Vendor
Cisco
Product
Cisco IOS XE Web UI
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2023-10-23
Original CVE updated
2023-10-23
Advisory published
2023-10-23
Advisory updated
2023-10-23

Who should care

Security teams, network administrators, and incident response staff responsible for Cisco IOS XE Web UI deployments should care most. Organizations with internet-facing or otherwise untrusted-network-accessible Cisco IOS XE Web UI instances should prioritize review immediately.

Technical summary

The available source material identifies the issue as a command injection vulnerability in Cisco IOS XE Web UI. CISA’s KEV entry directs affected organizations to verify compliance with BOD 23-02, apply vendor mitigations, and use Cisco’s instructions to determine whether a system may have been compromised. The provided corpus does not include deeper technical mechanics, affected versions, or exploit details, so conclusions should remain limited to the official advisory and KEV entry.

Defensive priority

High

Recommended defensive actions

  • Identify all Cisco IOS XE Web UI instances in the environment, including internet-facing and untrusted-network deployments.
  • Verify the systems are in compliance with BOD 23-02 as referenced by CISA.
  • Apply Cisco’s vendor mitigations and follow the official Cisco security advisory guidance.
  • Use Cisco’s instructions to determine whether any affected system may have been compromised.
  • Immediately report positive compromise findings to CISA, as directed in the KEV entry.

Evidence notes

This debrief is based only on the supplied official-source corpus: CISA KEV lists CVE-2023-20273 as 'Cisco IOS XE Web UI Command Injection Vulnerability,' vendor project Cisco, product Cisco IOS XE Web UI, dateAdded 2023-10-23, and dueDate 2023-10-27. The KEV metadata also instructs organizations to verify compliance with BOD 23-02, apply vendor mitigations, assess potential compromise for exposed instances, and report positive findings to CISA. The provided corpus does not include CVSS data or additional technical detail, so no unsupported claims are made.

Official resources

Publicly disclosed and added to CISA’s Known Exploited Vulnerabilities catalog on 2023-10-23.