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CVE-2024-3661

📛 CVE Title

DHCP routing options can manipulate interface-based VPN traffic

⬇ Download JSON ⚠ View as Threat

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.

Overview

State
PUBLISHED
Assigner (CNA)
cisa-cg
CVSS severity
HIGH
CVSS score
CVSS 7.6 / 10 7.6 7.6 / 10
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Effective score
7.6 / 10 HIGH source: CNA overview
CWE(s)
CWE-306, CWE-501
Reserved
2024-04-11
Published
2024-05-06 18:31 UTC
Last updated
2024-08-28 19:09 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2024/3xxx/CVE-2024-3661.json
Linked Threat
CVE-2024-3661 — Impact of TunnelVision Vulnerability

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2024-05-06 19:15:11 UTC
NVD last modified
2025-01-15 16:50:28 UTC
NVD CVSS v3.1
CVSS 7.6 / 10 7.6 7.6 / 10 HIGH source: 9119a7d8-5eab-497f-8521-727c672e3725
NVD CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Exploitability subscore
2.8 / 10
Impact subscore
4.7 / 10
EPSS score
0.0291 (probability of exploitation in next 30 days)
EPSS percentile
86.55% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD / KEV / EPSS data refreshed 2026-05-25 01:18 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2024-32236
Assigner
cisa-cg
Published
May 6, 2024, 6:31:21 PM
Updated
Aug 28, 2024, 7:09:06 PM
EUVD base score (CVSS 3.1)
7.6 / 10
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
EUVD-reported EPSS
2.9100
Vendors
IETF
Products
dhcp (0)
dhcp (0)
Aliases
GHSA-jcv7-6v4q-4m7x

ENISA 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.

EUVD references (20)

Affected products (1)
VendorProductVersionsPlatforms
IETF DHCP 0 (affected) —

Affected products — CPE 2.3 (24) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

  • cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:linux:*:*
  • cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:macos:*:*
  • cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:windows:*:*
  • cpe:2.3:a:fortinet:forticlient:7.4.0:*:*:*:*:linux:*:*
  • cpe:2.3:a:fortinet:forticlient:7.4.0:*:*:*:*:macos:*:*
  • cpe:2.3:a:fortinet:forticlient:7.4.0:*:*:*:*:windows:*:*
  • cpe:2.3:a:cisco:anyconnect_vpn_client:-:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:secure_client:-:*:*:*:*:*:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:iphone_os:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:linux:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:macos:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:windows:*:*
  • cpe:2.3:a:citrix:secure_access_client:*:*:*:*:*:*:*:*
  • cpe:2.3:o:apple:iphone_os:-:*:*:*:*:*:*:*
  • cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
  • cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
  • cpe:2.3:a:watchguard:ipsec_mobile_vpn_client:*:*:*:*:*:macos:*:*
  • cpe:2.3:a:watchguard:ipsec_mobile_vpn_client:*:*:*:*:*:windows:*:*
  • cpe:2.3:a:watchguard:mobile_vpn_with_ssl:*:*:*:*:*:macos:*:*
  • cpe:2.3:a:watchguard:mobile_vpn_with_ssl:*:*:*:*:*:windows:*:*
  • cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:linux:*:*
  • cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:macos:*:*
  • cpe:2.3:a:zscaler:client_connector:-:*:*:*:*:windows:*:*

Vendor references (20)

References embedded in the original CVE record by the assigning CNA.

MITRE references (19) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (13)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (40)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Indicators (1)

IOCs linked to the auto-promoted Threat row.

TypeValueVirusTotalAttached
cve CVE-2024-3661 no local data 2026-05-14 09:34 UTC

Flagged vendors

    Remediations (8)

    Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

    • April 2026 Critical Patch Update Released | security - Oracle Blogs
      web:blogs.oracle.com

      For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.

      2026-05-17 13:26 UTC
    • Microsoft Patch Tuesday May 2026 - 120 Vulnerabilities Fixed, Including ...
      web:cybersecuritynews.com

      Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.

      2026-05-17 13:26 UTC
    • AI drives new debate around CISA software patching deadlines
      web:federalnewsnetwork.com

      CISA this year has already started accelerating the deadlines for agencies to patch software bugs posted to the Known Exploited Vulnerabilities (KEV) catalog.

      2026-05-17 13:26 UTC
    • Security Update Guide - Microsoft
      web:portal.msrc.microsoft.com

      The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

      2026-05-17 13:26 UTC
    • CISA orders feds to patch exploited Fortinet EMS flaw by Friday
      web:www.bleepingcomputer.com

      The U.S. Cybersecurity and Infrastructure Security Agency (CISA) ordered federal agencies to secure FortiClient Enterprise Management Server (EMS) instances against an actively exploited ...

      2026-05-17 13:26 UTC
    • CVE: Common Vulnerabilities and Exposures
      web:www.cve.org

      At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures

      2026-05-17 13:26 UTC
    • Microsoft Technical Security Notifications
      web:www.microsoft.com

      Security Update Guide Notifications Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed.

      2026-05-17 13:26 UTC
    • Oracle Critical Patch Update Advisory - April 2026
      web:www.oracle.com

      This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

      2026-05-17 13:26 UTC

    AI Forensic Analysis

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    Raw JSON

    The full cvelistV5 record. Download as CVE-2024-3661.json.

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