CVE-2021-35395: Realtek AP-Router SDK Buffer Overflow Vulnerability

CISA Known Exploited Vulnerability (KEV)

Description

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.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-35395

Weakness behind it

CISA records this vulnerability as an instance of CWE-20, CWE-122. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.

References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-35395
• KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog