{"id":"CVE-2021-21816","aliases":["EUVD-2021-8987","GHSA-c5h4-7vc8-8w5m"],"status":"published","title":"An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1...","description":"An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to the disclosure of sensitive information. An attacker can send an HTTP request to trigger this vulnerability.","severity":{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.32385,"percentile":0.98341,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200","CWE-922"],"published":"2021-07-16T10:28:42Z","modified":"2026-06-17T03:36:10Z","exploits":[{"source":"nuclei","id":"CVE-2021-21816","title":"D-Link DIR-3040 1.13B03 - Information Disclosure","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-21816.yaml"}],"products":[{"vendor":"dlink","product":"dir-3040_firmware"}],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1281","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21816"},{"url":"https://github.com/advisories/GHSA-c5h4-7vc8-8w5m"}],"sources":{"cve":[{"id":"CVE-2021-21816","description":"An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to the disclosure of sensitive information. An attacker can send an HTTP request to trigger this vulnerability.","status":"published","published":"2021-07-16T10:28:42Z","modified":"2024-08-03T18:23:29.523Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:33:00.137099Z"}],"euvd":[{"id":"EUVD-2021-8987","description":"An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to the disclosure of sensitive information. An attacker can send an HTTP request to trigger this vulnerability.","status":"published","published":"2021-07-16T10:28:42Z","modified":"2024-08-03T18:23:29Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T03:25:04.672228Z"}],"ghsa":[{"id":"GHSA-c5h4-7vc8-8w5m","title":"An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1...","description":"An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to the disclosure of sensitive information. An attacker can send an HTTP request to trigger this vulnerability.","status":"published","published":"2022-05-24T19:08:19Z","modified":"2023-01-27T05:03:55Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-200","CWE-922"],"updated_at":"2026-11-02T14:42:20.947965Z"}],"nvd":[{"id":"CVE-2021-21816","description":"An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to the disclosure of sensitive information. An attacker can send an HTTP request to trigger this vulnerability.","status":"published","published":"2021-07-16T11:15:09.9Z","modified":"2026-06-17T03:36:10.207Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:06:55.747384Z"}]}}