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CVE-2021-35395: Realtek AP-Router SDK Buffer Overflow Vulnerability
Realtek AP-Router SDK · in CISA KEV since 2021-11-03
2021-11-03added to KEV
2021-11-17federal remediation due date
97.96%EPSS exploit probability (30 days) 99.9th percentile
9.8 CRITICALCVSS 3.1
Unknownknown ransomware use
79days from NVD publication to KEV
What it is
Realtek AP-Router SDK HTTP web server boa contains a buffer overflow vulnerability due to unsafe copies of some overly long parameters submitted in the form that lead to denial-of-service (DoS).
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-20;CWE-122 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2021-08-16 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-35395.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.