CVE-2026-20320Cisco BroadWorks XXE
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.
Published Aug 19, 2026 · Updated Nov 10, 2026
Key Facts
Patch immediately- CVE-2026-20320 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Broadworks Application Delivery Platform (Cisco), Broadworks Application Server (Cisco), Broadworks Profile Server (Cisco) and 2 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV since Nov 8, 2026. A public exploit is reported by tracking sources, but no code link is listed yet.
- EPSS estimates a 0.4% probability of exploitation in the next 30 days.
- Fixed versions are available, including Broadworks Application Delivery Platform ri.2026.07, Broadworks Application Server 2026.0, Broadworks Profile Server 2026.07.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
0.4%
Higher than 32.9% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
43/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Nov 10, 2026
83 days after publication
Federal due date
Nov 24, 2026
14 days left
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
2
Reports of active use
Required action (CISA): Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 10, 2026 | Nov 24, 2026 | Not reported |
| Industry KEV feed | Nov 8, 2026 | Nov 24, 2026 | Not reported |
| CIRCL KEV | Nov 10, 2026 | Nov 24, 2026 | Not reported |
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Affected Products
5 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Broadworks Application Delivery PlatformCisco | See advisory | ri.2026.07 |
| Broadworks Application ServerCisco | See advisory | 2026.0 |
| Broadworks Profile ServerCisco | See advisory | 2026.07 |
| Broadworks Xtended Services PlatformCisco | See advisory | 2026.07 |
| Cisco BroadWorks | >= N/A | n/a |
Patched Releases
Broadworks Application Delivery Platform
ri.2026.07
Broadworks Application Server
2026.0
Broadworks Profile Server
2026.07
Broadworks Xtended Services Platform
2026.07
Timeline
Publicly disclosed
Aug 19, 2026
Added to Industry KEV feed
Nov 8, 2026
Added to CISA KEV
Nov 10, 2026
Added to CIRCL KEV
Nov 10, 2026
Last updated
Nov 10, 2026
Weakness Type
- CWE-611 Improper Restriction of XML External Entity Reference
References
FAQ
Common Questions.
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.
Affected: Broadworks Application Delivery Platform (Cisco); Broadworks Application Server (Cisco); Broadworks Profile Server (Cisco), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV since Nov 8, 2026.
Yes. It was added on Nov 10, 2026 with a federal remediation due date of Nov 24, 2026.
A public exploit is reported by tracking sources, but no code link is listed yet.
Fixed versions are available, including Broadworks Application Delivery Platform ri.2026.07, Broadworks Application Server 2026.0, Broadworks Profile Server 2026.07.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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