An issue was discovered in HCC embedded InterNiche 4.0.1.
Priority LOW 36CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
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 an incorrect signed integer comparison. This vulnerability requires the attacker to send a malformed HTTP packet with a negative Content-Length, which bypasses the size checks and results in a large heap overflow in the wbs_multidata buffer copy.
Why it matters now
EPSS 0.01675 77th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:hcc-embedded:nichestack:*:*:*:*:*:*:*:* | before 4.3 | Vulnerable | Hcc-embedded |
- cpe:2.3:a:hcc-embedded:nichestack:*:*:*:*:*:*:*:* Versions before 4.3 Vulnerable ·Hcc-embedded
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-31227
- 2026-10-03 Alias added: GHSA-29fm-9qqr-x2gp
References
More Hcc-embedded Nichestack vulnerabilities
- TI-2020-18156 An issue was discovered in HCC Nichestack 3.0. CVSS 3.1CRITICAL 9.1
- TI-2021-09021 The web server in InterNiche NicheStack through 4.0.1 allows remote attackers to cause a… CVSS 3.1HIGH 7.5
- TI-2021-14884 An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3. CVSS 3.1HIGH 7.5
- TI-2021-11533 An issue was discovered in tcp_rcv() in nptcp.c in HCC embedded InterNiche 4.0.1. CVSS 3.1HIGH 7.5
- TI-2020-18155 An issue was discovered in HCC Nichestack 3.0. CVSS 3.1HIGH 7.5
- TI-2020-18154 An issue was discovered in HCC Nichestack 3.0. CVSS 3.1HIGH 7.5
Sources
- CVE-2021-31227 · CVE Program
- CVE-2021-31227 · NVD
- FIRST EPSS
- GHSA-29fm-9qqr-x2gp · GitHub Advisory Database · CC BY 4.0
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