{"answers":{"affected":"It affects 4 products.","exploited":"There is no known exploitation of CVE-2021-1520 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-1520 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-1520 is a medium-severity command injection vulnerability in Cisco Small Business RV Series Router Firmware, published on 6 May 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-2021-1520 and fix it if it is affected.\n\nWhat it is: CVE-2021-1520 is a medium-severity command injection vulnerability in Cisco Small Business RV Series Router Firmware, published on 6 May 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-2021-1520 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-2021-1520/ (Markdown: https://insights.sbomify.com/CVE-2021-1520/index.md)","id":"CVE-2021-1520","markdown":"https://insights.sbomify.com/CVE-2021-1520/index.md","name":"CVE-2021-1520","record":{"aliases":["GHSA-4vxg-6hgq-qr48"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Cisco RV Series Router","requires_auth":"high_privilege","summary":"Authenticated local attackers can execute arbitrary commands with root privileges on Cisco RV series routers due to improper input sanitization in internal messaging.","user_interaction":"not_required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[{"product":"rv340_firmware","vendor":"cisco"},{"product":"rv340w_firmware","vendor":"cisco"},{"product":"rv345_firmware","vendor":"cisco"},{"product":"rv345p_firmware","vendor":"cisco"}],"cvss":{"score":6.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-123","name":"Write-what-where Condition"}],"description":"A vulnerability in the internal message processing of Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an authenticated, local attacker to run arbitrary commands with root privileges on the underlying operating system (OS). This vulnerability exists because an internal messaging service does not properly sanitize input. An attacker could exploit this vulnerability by first authenticating to the device and then sending a crafted request to the internal service. A successful exploit could allow the attacker to run arbitrary commands with root privileges on the underlying OS. To exploit this vulnerability, the attacker must have valid Administrator credentials for the device.","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 RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Local Privilege Escalation Vulnerability","id":"CVE-2021-1520","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"command_injection","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Cisco Video Surveillance 8000 Series IP Cameras Cisco Discovery Protocol Denial of Service Vulnerability","id":"CVE-2021-1521"},"packages":[],"prev":{"headline":"Cisco AnyConnect Secure Mobility Client Profile Modification Vulnerability","id":"CVE-2021-1519"},"products":["Cisco Small Business RV Series Router Firmware"],"published":"2021-05-06","related":[{"cvss_score":10,"headline":"Cisco Small Business RV Series Routers Stack-based Buffer Overflow","id":"CVE-2022-20699","kev_date_added":"2022-03-03","published":"2022-02-10"},{"cvss_score":10,"headline":"Cisco Small Business RV Series Routers Stack-based Buffer Overflow","id":"CVE-2022-20701","kev_date_added":"2022-03-03","published":"2022-02-10"},{"cvss_score":10,"headline":"Cisco Small Business RV Series Routers Stack-based Buffer Overflow","id":"CVE-2022-20708","kev_date_added":"2022-03-03","published":"2022-02-10"},{"cvss_score":10,"headline":"Cisco Small Business RV Series Routers Vulnerabilities","id":"CVE-2022-20707","kev_date_added":null,"published":"2022-02-10"},{"cvss_score":10,"headline":"Cisco Small Business RV Series Routers Vulnerabilities","id":"CVE-2022-20709","kev_date_added":null,"published":"2022-02-10"},{"cvss_score":10,"headline":"Cisco Small Business RV Series Routers Vulnerabilities","id":"CVE-2022-20710","kev_date_added":null,"published":"2022-02-10"},{"cvss_score":10,"headline":"Cisco Small Business RV Series Routers Vulnerabilities","id":"CVE-2022-20711","kev_date_added":null,"published":"2022-02-10"}],"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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2024-11-08","vendors":["Cisco"]},"summary":"Authenticated local attackers can execute arbitrary commands with root privileges on Cisco RV series routers due to improper input sanitization in internal messaging.","url":"https://insights.sbomify.com/CVE-2021-1520/"}