{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-21816 exists.","fix":"No fix has been published for CVE-2021-21816 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21816 is a medium-severity vulnerability in D-LINK, published on 16 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-21816 and fix it if it is affected.\n\nWhat it is: CVE-2021-21816 is a medium-severity vulnerability in D-LINK, published on 16 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-21816 exists.\n\nAffected product: D-LINK. 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-2021-21816/ (Markdown: https://insights.sbomify.com/CVE-2021-21816/index.md)","id":"CVE-2021-21816","markdown":"https://insights.sbomify.com/CVE-2021-21816/index.md","name":"CVE-2021-21816","record":{"aliases":["GHSA-c5h4-7vc8-8w5m"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"D-Link router","requires_auth":"none","summary":"An attacker can send a crafted HTTP request to the Syslog functionality to disclose sensitive information from the device.","user_interaction":"required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"talos","cpe":[{"product":"dir-3040_firmware","vendor":"dlink"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.0"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":1,"refs":[{"date":null,"kind":"nuclei","ref":"http/cves/2021/CVE-2021-21816.yaml","stars":null,"title":"D-Link DIR-3040 1.13B03 - Information Disclosure"}],"tier":"weaponised"},"has_fix":null,"headline":"Information disclosure in D-LINK","id":"CVE-2021-21816","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Information disclosure in D-Link","id":"CVE-2021-21817"},"packages":[],"prev":{"headline":"Memory corruption in AT\u0026T","id":"CVE-2021-21815"},"products":["D-LINK"],"published":"2021-07-16","related":[{"cvss_score":10,"headline":"Hardcoded credentials in D-Link","id":"CVE-2021-21913","kev_date_added":null,"published":"2021-09-23"},{"cvss_score":10,"headline":"Hardcoded credentials in D-Link","id":"CVE-2021-21820","kev_date_added":null,"published":"2021-07-16"},{"cvss_score":9.8,"headline":"Command injection in n/a","id":"CVE-2022-44832","kev_date_added":null,"published":"2022-12-14"},{"cvss_score":9.1,"headline":"Command injection in D-Link","id":"CVE-2021-21819","kev_date_added":null,"published":"2021-07-16"},{"cvss_score":8.8,"headline":"D-Link DIR-3040 HTTP Request Processing Referer Heap-Based Buffer Overflow Remote Code Execution Vulnerability","id":"CVE-2023-41229","kev_date_added":null,"published":"2024-05-03"},{"cvss_score":8.8,"headline":"Memory corruption in DIR-3040","id":"CVE-2022-43648","kev_date_added":null,"published":"2023-03-29"},{"cvss_score":7.5,"headline":"D-Link DIR-3040 HTTP Request Processing Referer Stack-Based Buffer Overflow Remote Code Execution Vulnerability","id":"CVE-2023-41230","kev_date_added":null,"published":"2024-05-03"}],"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)"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"An attacker can send a crafted HTTP request to the Syslog functionality to disclose sensitive information from the device.","url":"https://insights.sbomify.com/CVE-2021-21816/"}