Is CVE-2026-116573 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-116573 being exploited in the wild.

How severe is CVE-2026-116573?

Medium severity, with a CVSS score of 6.5, published 5 November 2026.

Which products and versions are affected?

SignalWire FreeSWITCH 1.10.0 to 1.11.1.

Is there a fix for CVE-2026-116573?

Yes: fixed in 1.11.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-116573 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-116573?

Check whether you run SignalWire FreeSWITCH at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-116573: FreeSWITCH mod_sofia stack buffer overflow in dialog notifications

CVE-2026-116573 · Severity: medium · CVSS 6.5 · Published 2026-11-05

FreeSWITCH is an open-source telecommunications platform used to handle VoIP calls and messaging. A flaw in the dialog notification feature allows a remote attacker to crash the entire platform and disconnect all active calls by sending a specially crafted SIP message with an excessively long user identifier. Exploitation typically requires valid credentials or specific configuration settings to be disabled.

Technologies: SignalWire FreeSWITCH. Vendors: SignalWire.

Quick answers

Is CVE-2026-116573 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-116573 being exploited in the wild.
How severe is CVE-2026-116573?: Medium severity, with a CVSS score of 6.5, published 5 November 2026.
Which products and versions are affected?: SignalWire FreeSWITCH 1.10.0 to 1.11.1.
Is there a fix for CVE-2026-116573?: Yes: fixed in 1.11.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-116573 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-116573?: Check whether you run SignalWire FreeSWITCH at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 1.11.2

Technical details

A stack-based buffer overflow exists in mod_sofia's sofia_dialog_probe_callback() function, where a fixed 512-byte buffer is filled using unbounded strcpy() with user-controlled SIP To-header data. When a peer establishes a dialog with a user part longer than 511 bytes and another peer subscribes to dialog-event notifications, the stored value overflows the stack buffer. The vulnerability requires presence or shared-appearance management to be enabled and typically requires valid profile credentials unless subscription authentication is disabled.

Affected products

SignalWire FreeSWITCH 1.10.0 to 1.11.1

Timeline

2026-11-05: disclosed

References

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