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.
The record classifies CVE-2026-116779 under weakness classes CWE-77, CWE-78, CWE-749. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 4 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 1.2% probability of exploitation in the next 30 days, higher than 70.6% of all scored CVEs
- CISA KEV
- Listed since 2026-11-09, federal remediation deadline 2026-11-12
- Threadlinqs priority
- 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- Published
- 2026-11-05
Is CVE-2026-116779 being exploited?
CISA added CVE-2026-116779 to the Known Exploited Vulnerabilities catalog on 2026-11-09, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-11-12 under BOD 22-01. Weaponised exploit code for CVE-2026-116779 is publicly available. 2 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 70 in the Threadlinqs vulnerability feed.
Affected products and versions
- signalwire: freeswitch
How to fix CVE-2026-116779
The record marks a vendor fix as available for CVE-2026-116779. Patch reference: https://github.com/signalwire/freeswitch/commit/7015f6a73ab3d67fed5fbfc277ecfb88a74c2a86. Because CVE-2026-116779 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-11-12. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-116779
No threat campaign in the Threadlinqs corpus currently references CVE-2026-116779, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.
Sources
Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, public proof-of-concept repositories. This product uses the NVD API but is not endorsed or certified by the NVD.