CVE-2025-23019
MEDIUMCVSS 6.5/10EPSS 0.93%
Last modified
CVE-2025-23019 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. IPv6-in-IPv4 tunneling (RFC 4213) allows an attacker to spoof and route traffic via an exposed network interface.. EPSS estimates a 0.93% chance of exploitation in the next 30 days.
Description
IPv6-in-IPv4 tunneling (RFC 4213) allows an attacker to spoof and route traffic via an exposed network interface.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ietf | Ipv6 | All versions |
References
- https://datatracker.ietf.org/doc/html/rfc4213Technical Description
- https://papers.mathyvanhoef.com/usenix2025-tunnels.pdfTechnical Description
- https://www.top10vpn.com/research/tunneling-protocol-vulnerability/Technical Description
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2025-23019?
IPv6-in-IPv4 tunneling (RFC 4213) allows an attacker to spoof and route traffic via an exposed network interface.
How severe is CVE-2025-23019?
CVE-2025-23019 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.
How do I fix CVE-2025-23019?
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.
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Are you affected by CVE-2025-23019?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST