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HIGH

CVE-2024-3661

CVSS v3

7.6

HIGH

EPSS Score

4.1 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • NetworkManagerAlmaLinux:9all versions · fixed in 1:1.48.10-5.el9_5and 15 other packages
  • NetworkManagerAlmaLinux:8all versions · fixed in 1:1.40.16-18.el8_10and 15 other packages

Vendor advisories

  • CVE-2024-3661 Red Hat Product Security669 products fixed · 24 known affected

    DHCP: DHCP routing options can manipulate interface-based VPN traffic

    NetworkManager as a component of Red Hat Enterprise Linux 6 · NetworkManager-devel as a component of Red Hat Enterprise Linux 6 · NetworkManager-glib as a component of Red Hat Enterprise Linux 6

  • RHSA-2025:16411 Red Hat Product Security223 products fixed

    Red Hat Security Advisory: NetworkManager security update

  • RHSA-2025:0377 Red Hat Product Security223 products fixed

    Red Hat Security Advisory: Security and bug fixes for NetworkManager

  • RHSA-2025:0288 Red Hat Product Security223 products fixed

    Red Hat Security Advisory: Bug fix of NetworkManager

Full record on NVD

Description

DHCP can add routes to a client’s routing table via the classless static route option (121). VPN-based security solutions that rely on routes to redirect traffic can be forced to leak traffic over the physical interface. An attacker on the same local network can read, disrupt, or possibly modify network traffic that was expected to be protected by the VPN.

Technical details

Published
2024-05-06

Frequently asked questions

What is CVE-2024-3661?

DHCP can add routes to a client’s routing table via the classless static route option (121). VPN-based security solutions that rely on routes to redirect traffic can be forced to leak traffic over the physical interface. An attacker on the same local network can read, disrupt, or possibly modify network traffic that was expected to be protected by the VPN.

Is CVE-2024-3661 actively exploited?

Active exploitation of CVE-2024-3661 has not been confirmed. Its EPSS score was 4.1% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-3661?

CVE-2024-3661 has a CVSS v3 base score of 7.6 (HIGH severity).

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