Is CVE-2026-40613 actively exploited?

No active exploitation of CVE-2026-40613 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40613 be exploited remotely?

Yes. CVE-2026-40613 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40613?

CVE-2026-40613 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-40613

HIGH

CVE-2026-40613

CWE-704Published: April 21, 2026· Updated: Apr 24, 2026

7.5

CVSS v3.1

EPSS:0.08%probability of exploitation in 30 daysPercentile:23.2th

Official Description

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.10.0, the STUN/TURN attribute parsing functions in coturn perform unsafe pointer casts from uint8_t * to uint16_t * without alignment checks. When processing a crafted STUN message with odd-aligned attribute boundaries, this results in misaligned memory reads at ns_turn_msg.c. On ARM64 architectures (AArch64) with strict alignment enforcement, this causes a SIGBUS signal that immediately kills the turnserver process. An unauthenticated remote attacker can crash any ARM64 coturn deployment by sending a single crafted UDP packet. This vulnerability is fixed in 4.10.0.

NVD Source

Technical Analysis

CVE-2026-40613 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.