CVE-2026-49475

High

Description

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 version 1.11.0, a STUN packet whose declared attribute length is shorter than the structure the parser casts to causes the parser to read and write past the end of the attribute, producing an out-of-bounds memory access on the per-leg media buffer. This issue has been patched in version 1.11.0.

SeverityHigh

CVSS7.5

Exploit probability20. percentile0.3%

ProductFreeswitch

PublishedJun 9, 2026

First seenJun 9, 2026

Weakness typeCWE-20Improper input validation CWE-125Out-of-bounds read CWE-787Out-of-bounds write

How to fix

Update

freeswitch freeswitch1.11.0 or later

Affected products

Product	Affected versions	Fixed in
freeswitch freeswitch	v < 1.11.0	1.11.0

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