{"id":"CVE-2021-29296","aliases":["EUVD-2021-15933","GHSA-4gp5-h62v-pf2f"],"status":"published","title":"** UNSUPPORTED WHEN ASSIGNED **Null Pointer Dereference vulnerability in D-Link DIR-825 2.10b02,...","description":"Null Pointer Dereference vulnerability in D-Link DIR-825 2.10b02, which could let a remote malicious user cause a denial of service. The vulnerability could be triggered by sending an HTTP request with URL /vct_wan; the sbin/httpd would invoke the strchr function and take NULL as a first argument, which finally leads to the segmentation fault. NOTE: The DIR-825 and all hardware revisions is considered End of Life and as such this issue will not be patched","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01127,"percentile":0.66567,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-476"],"published":"2021-08-10T19:52:06Z","modified":"2026-06-17T03:47:29Z","products":[{"vendor":"d-link","product":"dir-825"},{"vendor":"dlink","product":"dir-825_firmware"}],"references":[{"url":"https://www.dlink.com/en/security-bulletin/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10212","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-29296"},{"url":"https://www.dlink.com/en/security-bulletin"},{"url":"https://github.com/advisories/GHSA-4gp5-h62v-pf2f"}],"sources":{"cve":[{"id":"CVE-2021-29296","description":"Null Pointer Dereference vulnerability in D-Link DIR-825 2.10b02, which could let a remote malicious user cause a denial of service. The vulnerability could be triggered by sending an HTTP request with URL /vct_wan; the sbin/httpd would invoke the strchr function and take NULL as a first argument, which finally leads to the segmentation fault. NOTE: The DIR-825 and all hardware revisions is considered End of Life and as such this issue will not be patched","status":"published","published":"2021-08-10T19:52:06Z","modified":"2024-08-03T22:02:51.689Z","updated_at":"2026-11-02T14:33:06.658806Z"}],"euvd":[{"id":"EUVD-2021-15933","description":"Null Pointer Dereference vulnerability in D-Link DIR-825 2.10b02, which could let a remote malicious user cause a denial of service. The vulnerability could be triggered by sending an HTTP request with URL /vct_wan; the sbin/httpd would invoke the strchr function and take NULL as a first argument, which finally leads to the segmentation fault. NOTE: The DIR-825 and all hardware revisions is considered End of Life and as such this issue will not be patched","status":"published","published":"2021-08-10T19:52:06Z","modified":"2024-08-03T22:02:51Z","updated_at":"2026-11-03T03:24:45.000012Z"}],"ghsa":[{"id":"GHSA-4gp5-h62v-pf2f","title":"** UNSUPPORTED WHEN ASSIGNED **Null Pointer Dereference vulnerability in D-Link DIR-825 2.10b02,...","description":"** UNSUPPORTED WHEN ASSIGNED **Null Pointer Dereference vulnerability in D-Link DIR-825 2.10b02, which could let a remote malicious user cause a denial of service. The vulnerability could be triggered by sending an HTTP request with URL /vct_wan; the sbin/httpd would invoke the strchr function and take NULL as a first argument, which finally leads to the segmentation fault. NOTE: The DIR-825 and all hardware revisions is considered End of Life and as such this issue will not be patched.","status":"published","published":"2022-05-24T19:10:30Z","modified":"2024-03-30T05:01:44Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:55:45.190481Z"}],"nvd":[{"id":"CVE-2021-29296","description":"Null Pointer Dereference vulnerability in D-Link DIR-825 2.10b02, which could let a remote malicious user cause a denial of service. The vulnerability could be triggered by sending an HTTP request with URL /vct_wan; the sbin/httpd would invoke the strchr function and take NULL as a first argument, which finally leads to the segmentation fault. NOTE: The DIR-825 and all hardware revisions is considered End of Life and as such this issue will not be patched","status":"published","published":"2021-08-10T20:15:08.53Z","modified":"2026-06-17T03:47:29.747Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:06:56.943671Z"}]}}