Exploited vulnerabilities / CVE-2026-20320
Confirmed exploited · exploited vulnerability · Cisco BroadWorksCVE-2026-20320
Cisco BroadWorks exploited vulnerability, confirmed exploited in the wild.
Cisco BroadWorks contains an improper restriction of XML external entity reference vulnerability that could allow an unauthenticated, remote attacker to read sensitive configuration information on an affected system.
| CISA's name for it | Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability |
|---|---|
| Vendor and product | Cisco · BroadWorks |
| Type | exploited vulnerability · CWE-611 |
| Exploited | Confirmed by CISA listed 10 November 2026 |
| Likelihood | scored lower by EPSS, but already confirmed exploited, which outranks any prediction |
| Deadline | 24 November 2026 · 11 days left |
| Used in ransomware | Not reported |
| Advisories | sec.cloudapps.cisco.com ↗ · www.cisa.gov ↗ · www.cisa.gov ↗ · nvd.nist.gov ↗ |
Three steps, in this order
Apply the vendor's fix or mitigation; CISA lists only vulnerabilities seen exploited.
If you cannot patch now, restrict network access to the affected product.
Check for signs of compromise since the date it was added to the list.
| CISA's 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. |
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Know before someone else finds it
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CVE-2026-20320 in short
Is CVE-2026-20320 being exploited?
Yes. CISA added CVE-2026-20320 to its Known Exploited Vulnerabilities catalogue on 10 November 2026, which it does only on evidence of exploitation in the wild.
What is the CISA deadline for CVE-2026-20320?
US federal agencies must remediate it by 24 November 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.
How likely is CVE-2026-20320 to be exploited in the next 30 days?
FIRST's Exploit Prediction Scoring System gives it 0.8%, the 57th percentile of every CVE it scores.
How do I fix CVE-2026-20320?
Apply the vendor's fix or mitigation; CISA lists only vulnerabilities seen exploited. If you cannot patch now, restrict network access to the affected product. Check for signs of compromise since the date it was added to the list.
Other Cisco vulnerabilities being exploited
| CVE | Product | Type | Listed |
|---|---|---|---|
| CVE-2026-76418 | Secure Firewall ASA Software and Cisco Secure FTD Software | denial of service | 29 October 2026 |
| CVE-2026-76519 | Secure Email Gateway | path traversal | 14 October 2026 |
| CVE-2026-76504 | Catalyst SD-WAN Manager | privilege escalation | 30 September 2026 |
| CVE-2026-76460 | Identity Services Engine | privilege escalation | 16 September 2026 |
| CVE-2026-76461 | Secure Email Gateway | SQL injection | 14 September 2026 |
| CVE-2026-20079 | Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management | authentication bypass | 9 September 2026 |
Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.