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Actively exploited

CVE-2019-19006 Sangoma FreePBX Improper Authentication Vulnerability

Sangoma FreePBX contains an improper authentication vulnerability that potentially allows unauthorized users to bypass password authentication and access services provided by the FreePBX admin.

From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.

Our Assessment

Should You Worry?

Patch nowCybergen assessment
  • CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 3 Feb 2026.
  • Rated Critical severity (CVSS 9.8, scored by CISA).
  • It has been in the catalogue for 276 days. Systems still unpatched now have almost certainly been scanned for it.
The Vulnerability

What It Is

Sangoma FreePBX 115.0.16.26 and below, 14.0.13.11 and below, 13.0.197.13 and below have Incorrect Access Control.

From Watch to Action

What To Do Now

  1. 1

    Find it

    Search your asset inventory and external attack surface for Sangoma FreePBX. Include cloud images, appliances and anything a supplier runs for you.

    Attack Surface Management
  2. 2

    Fix it

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

    Vulnerability Management
  3. 3

    Hunt for compromise

    If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.

    Incident Response
  4. 4

    Prove it is fixed

    Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.

    Penetration Testing

Vendor Advisories

Regulation

The Compliance Clock

Cyber EssentialsRated critical, so if it affects devices in your Cyber Essentials scope, the update must be installed within 14 days of the vendor releasing it.NIS2If exploitation causes a significant incident, essential and important entities owe their CSIRT an early warning within 24 hours and a notification within 72 hours.DORAFinancial entities must classify ICT incidents and send an initial notification for a major incident within strict deadlines, with exploited flaws a common cause.US federal (BOD 22-01)Federal civilian agencies had until 24 Feb 2026 to remediate. A sensible benchmark for everyone else.

General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.

Stay Ahead

More Exploited Sangoma Flaws

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CVE-2026-9586Sangoma Switchvox SQL Injection VulnerabilityAdded 2 Sep 2026CVE-2025-64328Sangoma FreePBX OS Command Injection VulnerabilityAdded 3 Feb 2026CVE-2025-57819Sangoma FreePBX Authentication Bypass VulnerabilityAdded 29 Aug 2025

All 4 exploited Sangoma vulnerabilities

Not Sure If You Are Exposed?

Our attack surface and vulnerability teams can check your internet-facing estate for CVE-2019-19006 and every other exploited flaw on the list.

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Evidence

Sources

  1. CISA Known Exploited Vulnerabilities catalogue
  2. NVD: CVE-2019-19006
  3. CVE record: CVE-2019-19006
  4. FIRST EPSS
  5. wiki.freepbx.org/display/FOP/2019-11-20%2BRemote%2BAdmin%2BAuthentication%2BBypass
  6. freepbx.org/category/blog/
  7. wiki.freepbx.org/display/FOP/2019-11-20+Remote+Admin+Authentication+Bypass
  8. community.freepbx.org/t/freepbx-security-vulnerability-sec-2019-001/62772
  9. pastebin.com/2CdsQMKW