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Cisco

Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability

CVE-2026-20320

What this means

This is rated high severity (7.5 out of 10). It is on the known-exploited catalogue, which means attacks using it have already been seen. Ask IT whether Cisco Broadworks Application Delivery Platform, Cisco Broadworks Application Server and Cisco Broadworks Profile Server, and 1 more are in your estate, and treat that as the priority.

Full vendor description

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.

Scoring and exploitation

7.5/ 10
CVSS 3.1 base scoreHigh

Exploitable over the network without any account, and no one has to click or open anything. High impact on confidentiality.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitability

Longer bar: easier to attack

Attack vectorNetworkAV:N
Attack complexityLowAC:L
Privileges requiredNonePR:N
User interactionNoneUI:N
ScopeUnchangedS:U

Impact

Longer bar: more harm

ConfidentialityHighC:H
IntegrityNoneI:N
AvailabilityNoneA:N
~0.4% estimated chance of attack in 30 daysModel estimate (): a probability signal, not confirmed exploitation
Exploited in the wild
Yes — confirmed exploitation (US CISA )
Not reported
Listed product
Cisco BroadWorks

Weaknesses

CWE-611

Affected products ()

  • Cisco Broadworks Application Delivery Platform
  • Cisco Broadworks Application Server
  • Cisco Broadworks Profile Server
  • Cisco Broadworks Xtended Services Platform
Show the raw CPE strings (4)
  • cpe:2.3:a:cisco:broadworks_application_delivery_platform:*:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:broadworks_application_server:*:*:*:*:release_independent:*:*:*
  • cpe:2.3:a:cisco:broadworks_profile_server:*:*:*:*:release_independent:*:*:*
  • cpe:2.3:a:cisco:broadworks_xtended_services_platform:*:*:*:*:release_independent:*:*:*

References

3 links from the CVE record, grouped by site; the vendor's advisory comes first.

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