Cisco
Improper Restriction of XML External Entity Reference Vulnerability
Exploited in the wild. CISA added it to its Known Exploited Vulnerabilities list on 10 Nov 2026.
CVE-2026-20320High7.5
Chance of exploitation in the next 30 days
0.98%
EPSS score from FIRST
Black Shard's team can check your exposure to CVE-2026-20320 and take the fix off your plate.
A vulnerability in the Open Client Interface (OCI) XML Parser of Cisco BroadWorks could allow an unauthenticated, remote attacker to read sensitive configuration information on an affected system. This vulnerability exists because XML entries are improperly parsed due to external entity resolution being allowed by default. An attacker could exploit this vulnerability by sending a crafted XML message to the Open Client Interface – Provisioning (OCI-P) service. A successful exploit could allow the attacker to view sensitive files from the filesystem with the privileges of the Cisco BroadWorks user.
Updated 14 Nov 2026, 12:00 UTC, 33 of 36 sources answering.
Black Shard's team can check your exposure, take a fix off your plate or step in on a live incident.