HOMEVULNERABILITIESCVE-2026-7422
MEDIUM

CVE-2026-7422

CWE-290Published: April 29, 2026· Updated: May 4, 2026

6.5
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:3.8th

Official Description

Insufficient packet validation in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to bypass all checksum and minimum-size validation by spoofing the Ethernet source MAC address to match one of the device's own registered endpoints, because the loopback detection mechanism skips all input validation for packets whose source MAC matches a local endpoint.

To mitigate this issue, users should upgrade to the fixed version when available.

NVD Source

Technical Analysis

CVE-2026-7422 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

amazon1 product
freertos-plus-tcp
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-jpw4-6h59-62w9
ADVISORYhttps://aws.amazon.com/security/security-bulletins/2026-021-aws/

All References (4)

→
https://aws.amazon.com/security/security-bulletins/2026-021-aws/Vendor Advisory
→
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.2.6Release Notes
→
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.1Release Notes
→
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-jpw4-6h59-62w9Vendor Advisory · Patch

Quick Facts

CVE IDCVE-2026-7422
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-290
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedApr 29, 2026

Related CVEs (CWE-290)

CVE-2026-39858
10.0
CVE-2026-6213
10.0
CVE-2026-25660
9.8
CVE-2026-48567
9.8
CVE-2021-47923
9.8
CVE-2026-44649
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-7422 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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