High 7.5Published Sep 14, 2026

CVE-2026-54632SIPSorcery: Malformed UDP packet on the RTP/ICE socket can remotely terminate a media session (DoS)

Updated under an hour ago (2026-10-19 09:20 UTC)

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Exploited in the last 30 days

SIPSorcery is a WebRTC, SIP, and VoIP library for C# and .NET. Prior to 10.0.9, RTPChannel.OnRTPPacketReceived and the STUNAttribute.ParseMessageAttributes, STUNXORAddressAttribute, and STUNAddressAttribute parsing path index untrusted bytes without sufficient length checks, while UdpReceiver.EndReceiveFrom closes the channel when those operations raise a non-socket exception. A remote party can send a single short RTP packet or malformed zero-to-seven-byte STUN address attribute to the shared RTP/ICE socket, including during ICE connectivity checks before DTLS or STUN MESSAGE-INTEGRITY verification, and terminate the active RTP or WebRTC media session. The attacker must reach or learn the advertised ephemeral RTP/ICE port, but no authentication or user interaction is required, and the impact is limited to availability. This issue is fixed in version 10.0.9.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-20, CWE-755
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

sipsorcery-org sipsorcery sipsorcery_org:sipsorcery (from the name)	before 10.0.9	CNA record

References

https://github.com/sipsorcery-org/sipsorcery/security/advisories/GHSA-28gm-jrmw-xx93x-refsource-confirm
https://github.com/sipsorcery-org/sipsorcery/pull/1677x-refsource-misc
https://github.com/sipsorcery-org/sipsorcery/commit/bdb76cbc0c7216e3126f743fb78e8525af56cea2x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.