CVE-2026-5264
CRITICALCVSS 9.8/10EPSS 0.45%
Last modified
CVE-2026-5264 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Wolfssl | Wolfssl | < 5.9.1 |
References
- https://github.com/wolfssl/wolfssl/pull/10076Issue Tracking, Patch
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-5264?
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 severe is CVE-2026-5264?
CVE-2026-5264 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.
How do I fix CVE-2026-5264?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-5261A vulnerability was identified in Shandong Hoteam InforCente…7.3
- CVE-2026-52610An arbitrary file write/directory traversal vulnerability in…9.1
- CVE-2026-5262GitLab has remediated an issue in GitLab CE/EE affecting all…6.1
- CVE-2026-52622An issue in Wellav Technologies Co., Ltd Wellav WES Emergenc…7.5
- CVE-2026-5263URI nameConstraints from constrained intermediate CAs are pa…6.5
- CVE-2026-52630SQL Injection vulnerability in Woltlab WCF v.6.2.4 and befor…9.8
- CVE-2026-5265When generating an ICMP Destination Unreachable or Packet To…6.5
- CVE-2026-52656An issue in SJCAM AllWinner Tech products SJ4000-Air V1.4C a…9.8
- CVE-2026-5266Exposure of Sensitive Information to an Unauthorized Actor v…2.3
- CVE-2026-5267Ciena Navigator Network Control Suite (NCS) contains an info…7.5
- CVE-2026-52673SQL Injection vulnerability in Cboard v.0.4.2 and before all…6.5
- CVE-2026-5268An authentication bypass vulnerability exists in the default…9.1
Are you affected by CVE-2026-5264?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST