CVE-2025-23019

MEDIUMNVD 5.45.4—Trending — 3 sources updated this week

5.4

IPv6-in-IPv4 tunneling (RFC 4213) allows an attacker to spoof and route traffic via an exposed network interface.

CVSS v3: 5.4
EG Score: 5.4(medium)
EPSS: 18.5%
KEV: Not listed

Published

January 14, 2025

Last Modified

November 3, 2025

References (4)

cve@mitrehttps://datatracker.ietf.org/doc/html/rfc4213
cve@mitrehttps://papers.mathyvanhoef.com/usenix2025-tunnels.pdf
cve@mitrehttps://www.top10vpn.com/research/tunneling-protocol-vulnerability/
af854a3a-2127-422b-91ae-364da2661108https://www.kb.cert.org/vuls/id/199397

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-940

Data Freshness Timeline

(refreshed 11× in last 7d / 11× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-30 13:20 UTCEG score recompute
2026-05-30 13:20 UTCGHSA enrichment
2026-05-29 13:44 UTCepss_batch

Frequently asked(5)

What is CVE-2025-23019?

CVE-2025-23019 is a medium vulnerability published on January 14, 2025. IPv6-in-IPv4 tunneling (RFC 4213) allows an attacker to spoof and route traffic via an exposed network interface.

When was CVE-2025-23019 disclosed?

CVE-2025-23019 was first published in the National Vulnerability Database on January 14, 2025, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-23019 actively exploited?

CVE-2025-23019 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 18.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-23019?

CVE-2025-23019 has a CVSS v3 base score of 5.4 (NVD).

How do I remediate CVE-2025-23019?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-23019, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-23019

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CVE-2025-23019

📅 Published

🔄 Last Modified

🔗 References (4)