AUGUST 4, 2026
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Case File

CVE-2021-31401

HIGH · CVSS 7.5 EPSS 2.25%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-08-19 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2021-31401
Severity
HIGH
CVSS
7.5
EPSS
2.25%

Original NVD Description

An issue was discovered in tcp_rcv() in nptcp.c in HCC embedded InterNiche 4.0.1. The TCP header processing code doesn't sanitize the value of the IP total length field (header length + data length). With a crafted IP packet, an integer overflow occurs whenever the value of the IP data length is calculated by subtracting the length of the header from the total length of the IP packet.