CVE-2026-116569: high-severity vulnerability in signalwire freeswitch
FreeSWITCH: Pre-authentication out-of-bounds write in MSRP message body parsing
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
18Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5
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 1.11.2, msrp_parse_buffer() subtracted delimiter framing from a peer-controlled short segment whose MSRP byte range ended in * without first proving the segment was long enough. The unsigned result wrapped near SIZE_MAX and reached switch_msrp_msg_set_payload() as both an allocation size and memcpy length, while related pointer arithmetic could read before the receive buffer. The listener is disabled by default in msrp.conf.xml, but any deployment enabling an MSRP TCP or TLS port parses this framing before authentication. An unauthenticated network peer can corrupt memory and crash FreeSWITCH, dropping all active calls, although remote code execution has not been demonstrated. This issue is fixed in version 1.11.2.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
signalwire · freeswitchRelated CVEs — signalwire freeswitch
In the same product, most dangerous first.
CVE-2021-37624HIGHFreeSWITCH does not authenticate SIP MESSAGE requests, leading to spam and message spoofingEPSS 3.8%CVE-2021-41105HIGHFreeSWITCH susceptible to Denial of Service via invalid SRTP packetsEPSS 2.5%CVE-2021-41157MEDIUMFreeSWITCH does not authenticate SIP SUBSCRIBE requests by defaultEPSS 1.7%CVE-2021-41145HIGHFreeSWITCH susceptible to Denial of Service via SIP floodingEPSS 1.7%CVE-2023-51443HIGHFreeSWITCH susceptible to Denial of Service via DTLS Hello packets during call initiationEPSS 1.5%CVE-2023-40018HIGHFreeSWITCH allows remote users to trigger out of bounds write by offering an ICE candidate with unknown component IDEPSS 1.0%