CVE-2026-49475 json
FreeSWITCH: Out-of-bounds memory access in core STUN attribute parsing
published 2026-06-09 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-35470
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 20%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- signalwire freeswitch
Classification
References
-
github.com
/signalwire/freeswitch/security/advisories/GHSA-9j6h-hc95-q926
third-party-advisory
-
github.com
/signalwire/freeswitch/releases/tag/v1.11.0
release-notes
Sources
- CVE List CVE-2026-49475
- NVD CVE-2026-49475
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