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CVE-2026-116779

SignalWire FreeSwitch•CRITICAL · CVSS 9.8• In the wild In CISA KEV

What is CVE-2026-116779?

FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to 1.11.3, sofia_presence_handle_sip_i_message() split the To user of an inbound SIP MESSAGE on a plus sign and treated the left side as a chat protocol selector. Selecting the api chat proto reached switch_api_execute(), allowing a peer whose MESSAGE was accepted to run FreeSWITCH API commands, including operating-system command sinks, with the daemon's privileges. Inbound chat is enabled on the stock internal and external profiles, and any authenticated profile account is sufficient; stock directory users without password material can also remove that barrier in affected configurations. The flaw permits configuration and credential disclosure, arbitrary call control, and command execution, and exploitation has been observed in the wild. This issue is fixed in version 1.11.3.

CVSS9.8 NVD 3.1

SeverityCRITICAL

Exploitation In the wild In CISA KEV

EPSS2% · P82

Triage statusActive Exploit

ActionPatch immediately

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

CWECWE-77

NVD published2026-11-05

NVD last modified2026-11-10

Timeline

2026-11-05Published to the U.S. National Vulnerability Database (NVD)
2026-11-09Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
2026-11-10First covered in a defend.network daily briefing
2026-11-10NVD record last updated
2026-11-12CISA federal remediation deadline (BOD 22-01)

CISA Known Exploited Vulnerability

SignalWire FreeSwitch Code Injection Vulnerability

Added to KEV2026-11-09

Federal patch deadline2026-11-12

Known ransomware useUnknown

Affected product

SignalWire FreeSwitch

Remediation Steps

Apply the vendor security update for SignalWire FreeSwitch as a priority.
Restrict network exposure of the affected service to trusted sources until patched.
Review logs and detections for indicators of exploitation.
Confirm fixed versions against the official vendor advisory before deploying.

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 2 of November 2026 (November 9 – 15)
CISA KEV: OpenSSH auth bypass, IBM Aspera privilege escalation; Qubole AWS breach; N-able 30+ zero-days (2026-11-10)

Related vulnerabilities

CVE-2026-96951 – Microsoft Windows (same weakness: CWE-77)
CVE-2026-105134 – Ahsay AhsayCBS (same weakness: CWE-77)
CVE-2026-8037 – Progress LoadMaster (same weakness: CWE-77)
CVE-2026-42271 – BerriAI LiteLLM (same weakness: CWE-77)
CVE-2026-32194 – Microsoft Bing Images (same weakness: CWE-77)
CVE-2026-3854 – Github Enterprise Server (same weakness: CWE-77)

Browse all tracked CVEs in the defend.network CVE database →

🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.