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CVE-2021-31226

CRITICAL
9.8
CVSS Score
Published: August 19, 2021 at 10:48 AM UTC
Updated: June 17, 2026 at 03:51 AM UTC
1 product affected across 1 vendorInterniche

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Severity
CRITICAL9.8
Exploit prediction
EPSS 3%

Description

An issue was discovered in HCC embedded InterNiche 4.0.1. A potential heap buffer overflow exists in the code that parses the HTTP POST request, due to lack of size validation. This vulnerability requires the attacker to send a crafted HTTP POST request with a URI longer than 50 bytes. This leads to a heap overflow in wbs_post() via an strcpy() call.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCMitigationThird Party Advisory
Source: [email protected]
https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/
Third Party Advisoryx_refsource_CERT-VNx_refsource_MISCUS Government Resource
Source: [email protected]
https://www.kb.cert.org/vuls/id/608209

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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