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CVE-2026-20320 Cisco BroadWorks XXE: Detection & IOCs

CISA's KEV catalog lists Cisco BroadWorks CVE-2026-20320 as exploited, and this page gives 10 IOCs and 9 detection rules, including a free Splunk SPL rule.

Read the full threat intel for CVE-2026-20320 Cisco BroadWorks XXE: Detection & IOCs →

Chapters

  1. 0:00The hookCISA says two flaws are exploited.
  2. 0:05The storyCisco's fix shipped in August.
  3. 0:11Attack pathCISA says Cisco's XXE flaw reads files.
  4. 0:24AttributionNo threat actor is attributed.
  5. 0:29Indicators of compromise2 indicators to hunt: 2 package names.
  6. 0:35MITRE ATT&CK techniques4 ATT&CK techniques, from initial access to collection.
  7. 0:41Remediation5 steps now: Upgrade Cisco BroadWorks Application Server, Profile Server, Xtended Services Platform.
  8. 0:50Detection rules9 detection rules, in SPL, KQL and Sigma.
Transcript

0:00CISA says two flaws are exploited.

0:05Cisco's fix shipped in August.

0:07Openwave's fix came in 2021.

0:11CISA says Cisco's XXE flaw reads files.

0:15Openwave's transcoder converts unintended document types.

0:19Patches exist for both flaws.

0:25No threat actor is attributed. Confidence: low.

0:302 indicators to hunt: 2 package names.

0:364 ATT&CK techniques, from initial access to collection.

0:415 steps now: Upgrade Cisco BroadWorks Application Server, Profile Server, Xtended Services Platform.

0:519 detection rules, in SPL, KQL and Sigma.

0:56Threadlinqs. The unified security engineering platform.