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CVE-2021-26810

CRITICAL

9.8

CVSS Score

Published: March 30, 2021 at 01:27 PM UTC

Updated: June 17, 2026 at 03:43 AM UTC

2 products affected across 1 vendorDir 816 FirmwareDir-816

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Severity

CRITICAL9.8

Exploit prediction

EPSS 5%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Dir 816 Firmware · D-Link

95%

dlink-dir-816 (same device)

Dir-816 · D-Linkdevice

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.dlink.com/en/security-bulletin/

References (2)

x_refsource_MISCExploitThird Party Advisory

Source: [email protected]

https://github.com/GD008/vuln/blob/main/DIR-816.md

x_refsource_MISCVendor Advisory

Source: [email protected]

https://www.dlink.com/en/security-bulletin/

CVSS

9.8CRITICAL[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-78

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