CVE-2026-5264
9.8
CRITICAL
CVSS 3.1
EPSS 0.14%
Description
Heap buffer overflow in DTLS 1.3 ACK message processing. A remote attacker can send a crafted DTLS 1.3 ACK message that triggers a heap buffer overflow.
How to fix CVE-2026-5264
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- Debian/wolfssl—no fix listed
Is CVE-2026-5264 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |