An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3.
Priority LOW 37Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3. The tfshnd():tftpsrv.c TFTP packet processing function doesn't ensure that a filename is adequately '\0' terminated; therefore, a subsequent call to strlen for the filename might read out of bounds of the protocol packet buffer (if no '\0' byte exists within a reasonable range).
Why it matters now
EPSS 0.023 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 · 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-2021-36762
- 2026-10-03 Alias added: GHSA-xj6g-7vq6-3mcm
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-2021-11533 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
- TI-2021-11532 An issue was discovered in tcp_pulloutofband() in tcp_in.c in HCC embedded InterNiche… CVSS 3.1HIGH 7.5
Sources
- CVE-2021-36762 · CVE Program
- CVE-2021-36762 · NVD
- FIRST EPSS
- GHSA-xj6g-7vq6-3mcm · GitHub Advisory Database · CC BY 4.0
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