CVE-2026-7424
Last modified
CVE-2026-7424 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and lease times, and to cause a denial of service (permanent IP task freeze requiring hardware reset) by sending a single crafted DHCPv6 packet. The issue is present whenever DHCPv6 is enabled. To mitigate this issue, users should upgrade to version V4.2.6 or V4.4.1 or newer.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.
Description
Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and lease times, and to cause a denial of service (permanent IP task freeze requiring hardware reset) by sending a single crafted DHCPv6 packet. The issue is present whenever DHCPv6 is enabled. To mitigate this issue, users should upgrade to version V4.2.6 or V4.4.1 or newer.
Metrics
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Amazon | Freertos-Plus-Tcp | >= 4.0.0, < 4.2.6 |
| Amazon | Freertos-Plus-Tcp | >= 4.3.0, < 4.4.1 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-7424?
How severe is CVE-2026-7424?
How do I fix CVE-2026-7424?
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.
Related CVEs from 2026
- CVE-2026-7418A vulnerability was determined in UTT HiPER 1250GW up to 3.2…8.8
- CVE-2026-7419A vulnerability was identified in UTT HiPER 1250GW up to 3.2…8.8
- CVE-2026-7420A security flaw has been discovered in UTT HiPER 1250GW up t…8.8
- CVE-2026-7421The Passeum Ticketing plugin for WordPress is vulnerable to …4.4
- CVE-2026-7422Insufficient packet validation in FreeRTOS-Plus-TCP before V…7.1
- CVE-2026-7423Integer underflow in the ICMP and ICMPv6 echo reply handlers…6.5
- CVE-2026-7425Insufficient option length validation in the IPv6 Router Adv…6.5
- CVE-2026-7426Insufficient validation of the prefix length field in IPv6 R…8.1
- CVE-2026-7427GitLab has remediated an issue in GitLab CE/EE affecting all…5.3
- CVE-2026-7428Prior to 2025-11-03, well-intended users of Terraform or RES…9.2
- CVE-2026-7429SSCMS v7.4.0 contains a reflected cross-site scripting vulne…4.6
- CVE-2026-7430The Post Snippets plugin for WordPress is vulnerable to Stor…4.4
Are you affected by CVE-2026-7424?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST