An issue was discovered in HCC Nichestack 3.0.
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 HCC Nichestack 3.0. The code that parses TCP packets relies on an unchecked value of the IP payload size (extracted from the IP header) to compute the length of the TCP payload within the TCP checksum computation function. When the IP payload size is set to be smaller than the size of the IP header, the TCP checksum computation function may read out of bounds (a low-impact write-out-of-bounds is also possible).
Why it matters now
EPSS 0.02287 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:3.0:*:*:*:*:*:*:* | 3.0 | 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:3.0:*:*:*:*:*:*:* Versions 3.0 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-2020-35684
- 2026-10-03 Alias added: GHSA-748v-rhfv-4hm6
References
Sources
- CVE-2020-35684 · CVE Program
- CVE-2020-35684 · NVD
- FIRST EPSS
- GHSA-748v-rhfv-4hm6 · GitHub Advisory Database · CC BY 4.0
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