Dashboard / CVE-2026-7423

CVE-2026-7423

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 57/100
Published: 2026-04-29 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Adjacent Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Adjacent
AC: Low
PR: None
UI: None
S: X
AT: Present
VC: None
VI: None
VA: High

Description

Integer underflow in the ICMP and ICMPv6 echo reply handlers in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network user to cause a denial of service (device crash) when outgoing ping support is enabled, because header sizes are subtracted from a packet length field without validating the field is large enough, resulting in a heap out-of-bounds read of up to approximately 65KB. To mitigate this issue, users should upgrade to the fixed version when available.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
amazon freertos-plus-tcp 4.0.0 – 4.2.6

References & Advisories (4)

Bug Bounty Relevance

57 / 100
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

6.0 / 10.0 v4.0
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/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

EPSS — Exploitation Probability

0.22%
Raw Score 0.002210
Percentile 12.7%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00221
2026-10-28
0.00221

Intelligence Sources

nvd ref →

External Links