{"answers":{"affected":"It affects 11 products.","exploited":"There is no known exploitation of CVE-2021-1309 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-1309 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-1309 is a high-severity memory corruption vulnerability in Cisco Small Business RV Series Router Firmware, published on 8 Apr 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-2021-1309 and fix it if it is affected.\n\nWhat it is: CVE-2021-1309 is a high-severity memory corruption vulnerability in Cisco Small Business RV Series Router Firmware, published on 8 Apr 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-2021-1309 in the wild and no public exploit code.\n\nAffected product: Cisco Small Business RV Series Router Firmware. 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-2021-1309/ (Markdown: https://insights.sbomify.com/CVE-2021-1309/index.md)","id":"CVE-2021-1309","markdown":"https://insights.sbomify.com/CVE-2021-1309/index.md","name":"CVE-2021-1309","record":{"aliases":["GHSA-mqj7-w9r3-q3p2"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Cisco Small Business Router","requires_auth":"none","summary":"An adjacent attacker can execute arbitrary code or cause a denial of service on Cisco Small Business RV Series Routers via LLDP vulnerabilities.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[{"product":"rv132w_firmware","vendor":"cisco"},{"product":"rv134w_firmware","vendor":"cisco"},{"product":"rv160_firmware","vendor":"cisco"},{"product":"rv160w_firmware","vendor":"cisco"},{"product":"rv260_firmware","vendor":"cisco"},{"product":"rv260p_firmware","vendor":"cisco"},{"product":"rv260w_firmware","vendor":"cisco"},{"product":"rv340_firmware","vendor":"cisco"},{"product":"rv340w_firmware","vendor":"cisco"},{"product":"rv345_firmware","vendor":"cisco"},{"product":"rv345p_firmware","vendor":"cisco"}],"cvss":{"score":7.4,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime"},{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business RV Series Routers. An unauthenticated, adjacent attacker could execute arbitrary code or cause an affected router to leak system memory or reload. A memory leak or device reload would cause a denial of service (DoS) condition on an affected device. For more information about these vulnerabilities, see the Details section of this advisory. Note: LLDP is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).","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":"Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities","id":"CVE-2021-1309","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Cisco Webex Meetings Open Redirect Vulnerability","id":"CVE-2021-1310"},"packages":[],"prev":{"headline":"Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities","id":"CVE-2021-1308"},"products":["Cisco Small Business RV Series Router Firmware"],"published":"2021-04-08","related":[{"cvss_score":9.8,"headline":"Cisco VPN Routers Remote Code Execution","id":"CVE-2018-0125","kev_date_added":"2022-03-25","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Missing authorization in Cisco RV132W and RV134W Wireless VPN Routers","id":"CVE-2018-0127","kev_date_added":null,"published":"2018-02-08"},{"cvss_score":7.4,"headline":"Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities","id":"CVE-2021-1251","kev_date_added":null,"published":"2021-04-08"},{"cvss_score":7.4,"headline":"Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities","id":"CVE-2021-1308","kev_date_added":null,"published":"2021-04-08"},{"cvss_score":7.2,"headline":"Command injection in Cisco Small Business RV Series Router Firmware","id":"CVE-2021-1287","kev_date_added":null,"published":"2021-03-18"}],"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-11-08","vendors":["Cisco"]},"summary":"An adjacent attacker can execute arbitrary code or cause a denial of service on Cisco Small Business RV Series Routers via LLDP vulnerabilities.","url":"https://insights.sbomify.com/CVE-2021-1309/"}