An issue was discovered in tcp_rcv() in nptcp.c in HCC embedded InterNiche 4.0.1.
Priority LOW 37CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.02252 83rd 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 · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:hcc-embedded:nichestack:*:*:*:*:*:*:*:* | before 4.3 | Vulnerable | Hcc-embedded |
| cpe:2.3:o:siemens:sentron_3wl_com35_firmware:*:*:*:*:*:*:*:* | before 1.2.0 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:sentron_3wl_com35:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:sentron_3wa_com190_firmware:*:*:*:*:*:*:*:* | before 2.0.0 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:sentron_3wa_com190:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
- cpe:2.3:a:hcc-embedded:nichestack:*:*:*:*:*:*:*:* Versions before 4.3 Vulnerable ·Hcc-embedded
- cpe:2.3:o:siemens:sentron_3wl_com35_firmware:*:*:*:*:*:*:*:* Versions before 1.2.0 Vulnerable ·Siemens
- cpe:2.3:h:siemens:sentron_3wl_com35:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:sentron_3wa_com190_firmware:*:*:*:*:*:*:*:* Versions before 2.0.0 Vulnerable ·Siemens
- cpe:2.3:h:siemens:sentron_3wa_com190:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-31401
- 2026-10-03 Alias added: GHSA-jggm-qmcw-j5f5
References
Sources
- CVE-2021-31401 · CVE Program
- CVE-2021-31401 · NVD
- FIRST EPSS
- GHSA-jggm-qmcw-j5f5 · GitHub Advisory Database · CC BY 4.0
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