SiHAS Improper Authentication vulnerability
Priority MEDIUM 46CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287.
Summary
There is no account authentication and permission check logic in the firmware and existing apps of SiHAS's SGW-300, ACM-300, GCM-300, so unauthorized users can remotely control the device.
Why it matters now
EPSS 0.01915 79th 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 |
|---|---|---|---|---|---|
| Shina System Co.,Ltd | SiHAS firmware | 1.xx | — | No fix listed | CNA |
| Shina System Co.,Ltd | SiHAS old app | old app | — | No fix listed | CNA |
- SiHAS firmware VendorShina System Co.,Ltd Affected 1.xx Fixed in — No fix listed CNA
- SiHAS old app VendorShina System Co.,Ltd Affected old app Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:shinasys:sihas_sgw-300_firmware:-:*:*:*:*:android:*:* | not specified by NVD | Vulnerable | Shinasys |
| cpe:2.3:o:shinasys:sihas_sgw-300_firmware:-:*:*:*:*:iphone_os:*:* | not specified by NVD | Vulnerable | Shinasys |
| cpe:2.3:h:shinasys:sihas_sgw-300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Shinasys |
| cpe:2.3:o:shinasys:sihas_acm-300_firmware:-:*:*:*:*:android:*:* | not specified by NVD | Vulnerable | Shinasys |
| cpe:2.3:o:shinasys:sihas_acm-300_firmware:-:*:*:*:*:iphone_os:*:* | not specified by NVD | Vulnerable | Shinasys |
| cpe:2.3:h:shinasys:sihas_acm-300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Shinasys |
| cpe:2.3:o:shinasys:sihas_gcm-300_firmware:-:*:*:*:*:android:*:* | not specified by NVD | Vulnerable | Shinasys |
| cpe:2.3:o:shinasys:sihas_gcm-300_firmware:-:*:*:*:*:iphone_os:*:* | not specified by NVD | Vulnerable | Shinasys |
| cpe:2.3:h:shinasys:sihas_gcm-300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Shinasys |
- cpe:2.3:o:shinasys:sihas_sgw-300_firmware:-:*:*:*:*:android:*:* Versions not specified by NVD Vulnerable ·Shinasys
- cpe:2.3:o:shinasys:sihas_sgw-300_firmware:-:*:*:*:*:iphone_os:*:* Versions not specified by NVD Vulnerable ·Shinasys
- cpe:2.3:h:shinasys:sihas_sgw-300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Shinasys
- cpe:2.3:o:shinasys:sihas_acm-300_firmware:-:*:*:*:*:android:*:* Versions not specified by NVD Vulnerable ·Shinasys
- cpe:2.3:o:shinasys:sihas_acm-300_firmware:-:*:*:*:*:iphone_os:*:* Versions not specified by NVD Vulnerable ·Shinasys
- cpe:2.3:h:shinasys:sihas_acm-300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Shinasys
- cpe:2.3:o:shinasys:sihas_gcm-300_firmware:-:*:*:*:*:android:*:* Versions not specified by NVD Vulnerable ·Shinasys
- cpe:2.3:o:shinasys:sihas_gcm-300_firmware:-:*:*:*:*:iphone_os:*:* Versions not specified by NVD Vulnerable ·Shinasys
- cpe:2.3:h:shinasys:sihas_gcm-300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Shinasys
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-26637
- 2026-10-03 Alias added: GHSA-4j8v-2qmr-6m8p
References
Sources
- CVE-2021-26637 · CVE Program
- CVE-2021-26637 · NVD
- FIRST EPSS
- GHSA-4j8v-2qmr-6m8p · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences