How severe is CVE-2025-23018?

CVE-2025-23018 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-23018 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-23018?

CVE-2025-23018 affects Ietf Ipv6. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-23018?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-23018 have an EU (EUVD) identifier?

Yes. CVE-2025-23018 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-3076.

When was CVE-2025-23018 published?

CVE-2025-23018 was published on 2025-01-14 and last updated on 2026-06-17.

CVE-2025-23018

CVE-2025-23018 is a medium-severity vulnerability in Ietf Ipv6 with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-940.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-3076
Weakness: CWE-940
Affected product: Ietf Ipv6
Published: 2025-01-14
Last modified: 2026-06-17

Description

IPv4-in-IPv6 and IPv6-in-IPv6 tunneling (RFC 2473) do not require the validation or verification of the source of a network packet, allowing an attacker to spoof and route arbitrary traffic via an exposed network interface. This is a similar issue to CVE-2020-10136.

Frequently asked questions

What is CVE-2025-23018?: IPv4-in-IPv6 and IPv6-in-IPv6 tunneling (RFC 2473) do not require the validation or verification of the source of a network packet, allowing an attacker to spoof and route arbitrary traffic via an exposed network interface. This is a similar issue to CVE-2020-10136.
How severe is CVE-2025-23018?: CVE-2025-23018 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-23018 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-23018?: CVE-2025-23018 affects Ietf Ipv6. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-23018?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-23018 have an EU (EUVD) identifier?: Yes. CVE-2025-23018 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-3076.
When was CVE-2025-23018 published?: CVE-2025-23018 was published on 2025-01-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ietf:ipv6:-:*:*:*:*:*:*:*

More vulnerabilities in Ietf Ipv6

CVE-2016-10142 — High (CVSS 8.6): An issue was discovered in the IPv6 protocol specification, related to ICMP Packet Too Big (PTB) messages. (The scope…
CVE-2007-2242 — High (CVSS 7.8): The IPv6 protocol allows remote attackers to cause a denial of service via crafted IPv6 type 0 route headers…
CVE-2025-23019 — Medium (CVSS 5.4): IPv6-in-IPv4 tunneling (RFC 4213) allows an attacker to spoof and route traffic via an exposed network interface.

All CVEs affecting Ietf Ipv6 →

Other CWE-940 vulnerabilities

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CVE-2024-40515 — Critical (CVSS 9.8): An issue in SHENZHEN TENDA TECHNOLOGY CO.,LTD Tenda AX2pro V16.03.29.48_cn allows a remote attacker to execute…
CVE-2023-41355 — Critical (CVSS 9.8): Chunghwa Telecom NOKIA G-040W-Q Firewall function has a vulnerability of input validation for ICMP redirect messages.…
CVE-2026-48745 — Critical (CVSS 9.3): Traccar Client is a GPS tracking mobile app for sending location updates to private servers using the open-source…
CVE-2026-33875 — Critical (CVSS 9.3): Gematik Authenticator securely authenticates users for login to digital health applications. Versions prior to 4.16.0…

Browse all CWE-940 vulnerabilities →