{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-34203 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-34203 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-34203 is a high-severity vulnerability in n/a, published on 16 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-34203 and fix it if it is affected.\n\nWhat it is: CVE-2021-34203 is a high-severity vulnerability in n/a, published on 16 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-34203 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-2021-34203/ (Markdown: https://insights.sbomify.com/CVE-2021-34203/index.md)","id":"CVE-2021-34203","markdown":"https://insights.sbomify.com/CVE-2021-34203/index.md","name":"CVE-2021-34203","record":{"aliases":["GHSA-gr4j-7v97-rrfc"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["code_execution","data_read","security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"D-Link router","requires_auth":"none","summary":"Attackers can exploit hardcoded credentials in the Quagga process to gain telnet access, modify routing, and monitor traffic on D-Link DIR-2640-US routers.","user_interaction":"not_required","vuln_class":"hardcoded_credentials"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"dir-2640-us_firmware","vendor":"dlink"}],"cvss":{"score":8.1,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-1188","name":"Initialization of a Resource with an Insecure Default"}],"description":"D-Link DIR-2640-US 1.01B04 is vulnerable to Incorrect Access Control. Router ac2600 (dir-2640-us), when setting PPPoE, will start quagga process in the way of whole network monitoring, and this function uses the original default password and port. An attacker can easily use telnet to log in, modify routing information, monitor the traffic of all devices under the router, hijack DNS and phishing attacks. In addition, this interface is likely to be questioned by customers as a backdoor, because the interface should not be exposed.","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":"Hardcoded credentials in n/a","id":"CVE-2021-34203","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"hardcoded_credentials","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Hardcoded credentials in n/a","id":"CVE-2021-34204"},"packages":[],"prev":{"headline":"Memory corruption in n/a","id":"CVE-2021-34202"},"products":["n/a"],"published":"2021-06-16","related":[{"cvss_score":8.8,"headline":"Hardcoded credentials in Quagga Services on D-Link DIR-2640 Routers","id":"CVE-2021-20132","kev_date_added":null,"published":"2021-12-30"},{"cvss_score":8.4,"headline":"Path traversal in Quagga Services on D-Link DIR-2640 Routers","id":"CVE-2021-20134","kev_date_added":null,"published":"2021-12-30"},{"cvss_score":7.8,"headline":"Memory corruption in n/a","id":"CVE-2021-34202","kev_date_added":null,"published":"2021-06-16"},{"cvss_score":7.1,"headline":"Memory corruption in n/a","id":"CVE-2021-34201","kev_date_added":null,"published":"2021-06-16"},{"cvss_score":6.8,"headline":"Hardcoded credentials in n/a","id":"CVE-2021-34204","kev_date_added":null,"published":"2021-06-16"},{"cvss_score":6.1,"headline":"Path traversal in Quagga Services on D-Link DIR-2640 Routers","id":"CVE-2021-20133","kev_date_added":null,"published":"2021-12-30"}],"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":"2026-07-09","vendors":["n/a"]},"summary":"Attackers can exploit hardcoded credentials in the Quagga process to gain telnet access, modify routing, and monitor traffic on D-Link DIR-2640-US routers.","url":"https://insights.sbomify.com/CVE-2021-34203/"}