by Kastro
Paper/Archive/CVE-2026-5264

CVE-2026-5264

wolfSSL wolfSSL — DTLS 1.3 ACK heap buffer overflow

EPSS 0.4%CVSS 9.8
critical.is priorityof 100
37
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 38.8.388 × 207.8No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
wolfSSL< 5.9.15.9.1CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
wolfSSL (CNA)8.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/wolfssl/wolfssl/pull/10076