CVE-2021-26637
CRITICALCVSS 9.8/10EPSS 1.74%
Last modified
CVE-2021-26637 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 1.74% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Shinasys | Sihas Sgw-300 Firmware | All versions |
| Shinasys | Sihas Acm-300 Firmware | All versions |
| Shinasys | Sihas Gcm-300 Firmware | All versions |
References
- https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66782Broken Link, Third Party Advisory, VDB Entry
- https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66782Broken Link, Third Party Advisory, VDB Entry
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-26637?
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.
How severe is CVE-2021-26637?
CVE-2021-26637 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.74% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26637?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-26637?
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Scan your code nowSource: NVD / NIST