CVE-2026-5264CWE-122

DTLS 1.3 ACK heap buffer overflow

High · published April 9, 2026

CVSS v4.0
8.3
EPSS
1%
Percentile
47.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.3 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00593 · 47.6th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-04-09T21:43Z
EPSS history
Timeline
  • 09 APR 21:43Z
    DTLS 1.3 ACK heap buffer overflow
    cvelistv5