What is CVE-2021-33266?

CVE-2021-33266 is a critical-severity vulnerability in Dlink Dir-809, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-12-01.

How severe is CVE-2021-33266?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Dlink Dir-809

CVE-2021-33266

D-Link DIR-809 devices with firmware through DIR-809Ax_FW1.12WWB03_20190410 were discovered to contain a stack buffer overflow vulnerability in the function FUN_8004776c in /formVirtualApp. This vulnerability is triggered via a crafted POST request.

Vulnerability class: Buffer Overflow

EPSS: 0.169 (96.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

cve@mitre.org (x_refsource_MISC, Vendor Advisory)
cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-33266?: CVE-2021-33266 is a critical-severity vulnerability in Dlink Dir-809, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-12-01.
How severe is CVE-2021-33266?: Critical severity. CVSS v3 base score is 9.8 out of 10.