What is CVE-2021-26810?

CVE-2021-26810 is a critical-severity vulnerability in Dlink Dir-816, classified under OS Command Injection. CVSS score: 9.8/10. Published 2021-03-30.

How severe is CVE-2021-26810?

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

RCE in Dlink Dir-816

CVE-2021-26810

D-link DIR-816 A2 v1.10 is affected by a remote code injection vulnerability. An HTTP request parameter can be used in command string construction in the handler function of the /goform/dir_setWanWifi, which can lead to command injection via shell metacharacters in the statuscheckpppoeuser parameter.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.049 (91.2th 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

Dlink Dir-816 — versions a2
Dlink Dir-816_firmware — versions 1.10b05
N/a — versions n/a

Weakness classification (CWE)

CWE-78 — OS Command Injection

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-2021-26810?: CVE-2021-26810 is a critical-severity vulnerability in Dlink Dir-816, classified under OS Command Injection. CVSS score: 9.8/10. Published 2021-03-30.
How severe is CVE-2021-26810?: Critical severity. CVSS v3 base score is 9.8 out of 10.