CVE-2021-28843
HIGHCVSS 7.5/10EPSS 0.96%
Last modified
CVE-2021-28843 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Null Pointer Dereference vulnerability exists in TRENDnet TEW-755AP 1.11B03, TEW-755AP2KAC 1.11B03, TEW-821DAP2KAC 1.11B03, and TEW-825DAP 1.11B03 by sending the POST request to apply_cgi with an unknown action name.. EPSS estimates a 0.96% chance of exploitation in the next 30 days.
Description
Null Pointer Dereference vulnerability exists in TRENDnet TEW-755AP 1.11B03, TEW-755AP2KAC 1.11B03, TEW-821DAP2KAC 1.11B03, and TEW-825DAP 1.11B03 by sending the POST request to apply_cgi with an unknown action name.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Trendnet | Tew-755ap Firmware | 1.11b03 |
| Trendnet | Tew-755ap2kac Firmware | 1.11b03 |
| Trendnet | Tew-821dap2kac Firmware | 1.11b03 |
| Trendnet | Tew-825dap Firmware | 1.11b03 |
References
- https://github.com/zyw-200/EQUAFL/blob/main/TRENDnet%20ticket.pdfThird Party Advisory
- https://github.com/zyw-200/EQUAFL/blob/main/TRENDnet%20ticket.pdfThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-28843?
Null Pointer Dereference vulnerability exists in TRENDnet TEW-755AP 1.11B03, TEW-755AP2KAC 1.11B03, TEW-821DAP2KAC 1.11B03, and TEW-825DAP 1.11B03 by sending the POST request to apply_cgi with an unknown action name.
How severe is CVE-2021-28843?
CVE-2021-28843 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.96% probability of exploitation in the next 30 days.
How do I fix CVE-2021-28843?
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.
- 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-2021-28843?
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Scan your code nowSource: NVD / NIST