{"answers":{"affected":"It affects 9 products.","exploited":"There is no known exploitation of CVE-2021-28840 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-28840 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-28840 is a high-severity vulnerability in n/a, published on 10 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-28840 and fix it if it is affected.\n\nWhat it is: CVE-2021-28840 is a high-severity vulnerability in n/a, published on 10 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-28840 in the wild and no public exploit code.\n\nAffected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-28840/ (Markdown: https://insights.sbomify.com/CVE-2021-28840/index.md)","id":"CVE-2021-28840","markdown":"https://insights.sbomify.com/CVE-2021-28840/index.md","name":"CVE-2021-28840","record":{"aliases":["GHSA-wg9f-3ccx-6h3j"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"D-Link Access Point","requires_auth":"none","summary":"A null pointer dereference in D-Link access points allows remote attackers to cause a denial of service via a specific HTTP GET request.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"dap-2310_firmware","vendor":"dlink"},{"product":"dap-2330_firmware","vendor":"dlink"},{"product":"dap-2360_firmware","vendor":"dlink"},{"product":"dap-2553_firmware","vendor":"dlink"},{"product":"dap-2660_firmware","vendor":"dlink"},{"product":"dap-2690_firmware","vendor":"dlink"},{"product":"dap-2695_firmware","vendor":"dlink"},{"product":"dap-3320_firmware","vendor":"dlink"},{"product":"dap-3662_firmware","vendor":"dlink"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"Null Pointer Dereference vulnerability exists in D-Link DAP-2310 2.07.RC031, DAP-2330 1.07.RC028, DAP-2360 2.07.RC043, DAP-2553 3.06.RC027, DAP-2660 1.13.RC074, DAP-2690 3.16.RC100, DAP-2695 1.17.RC063, DAP-3320 1.01.RC014 and DAP-3662 1.01.RC022 in the upload_config function of sbin/httpd binary. When the binary handle the specific HTTP GET request, the content in upload_file variable is NULL in the upload_config function then the strncasecmp would take NULL as first argument, and incur the NULL pointer dereference vulnerability.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Null dereference in n/a","id":"CVE-2021-28840","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"Null dereference in n/a","id":"CVE-2021-28841"},"packages":[],"prev":{"headline":"Null dereference in n/a","id":"CVE-2021-28839"},"products":["n/a"],"published":"2021-08-10","related":[{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2022-38873","kev_date_added":null,"published":"2022-12-20"},{"cvss_score":7.5,"headline":"Null dereference in n/a","id":"CVE-2021-28838","kev_date_added":null,"published":"2021-08-10"},{"cvss_score":7.5,"headline":"Null dereference in n/a","id":"CVE-2021-28839","kev_date_added":null,"published":"2021-08-10"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"A null pointer dereference in D-Link access points allows remote attackers to cause a denial of service via a specific HTTP GET request.","url":"https://insights.sbomify.com/CVE-2021-28840/"}