Vulnerability · Published Aug 24, 2021 · Assigned by mitre

CVE-2021-39509

Critical 9.8

In plain English

A critical-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 5.1% (higher than 92% of all known vulnerabilities).

Severity (CVSS NVD)9.8Critical

Exploit odds (30 days)5.1%top 7.6% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

An issue was discovered in D-Link DIR-816 DIR-816A2_FWv1.10CNB05_R1B011D88210 The HTTP request parameter is used in the handler function of /goform/form2userconfig.cgi route, which can construct the user name string to delete the user function. This can lead to command injection through shell metacharacters.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://www.dlink.com/en/security-bulletin/ x_refsource_MISC
https://github.com/doudoudedi/main-DIR-816_A2_Command-injection/blob/main/injection.md x_refsource_MISC
https://github.com/doudoudedi/main-DIR-816_A2_Command-injection x_refsource_MISC