VulnerabilityModified
CVE-2021-39509
This can lead to command injection through shell metacharacters.
CRITICAL 9.8EPSS 5.10%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.10%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 5.10% probability · 92th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-77
- Affected
- dlink/dir-816 firmware
- Source
- cve@mitre.org
References
- https://github.com/doudoudedi/main-DIR-816_A2_Command-injectionThird Party Advisory
- https://github.com/doudoudedi/main-DIR-816_A2_Command-injection/blob/main/injection.mdExploit, Third Party Advisory
- https://www.dlink.com/en/security-bulletin/Vendor Advisory
- https://github.com/doudoudedi/main-DIR-816_A2_Command-injectionThird Party Advisory
- https://github.com/doudoudedi/main-DIR-816_A2_Command-injection/blob/main/injection.mdExploit, Third Party Advisory
- https://www.dlink.com/en/security-bulletin/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.