{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-27516 exists.","fix":"No fix has been published for CVE-2023-27516 yet. Limit exposure of the affected software until one is available.","what":"CVE-2023-27516 is a high-severity authentication bypass vulnerability in SoftEther VPN, published on 12 Oct 2023. 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-2023-27516 and fix it if it is affected.\n\nWhat it is: CVE-2023-27516 is a high-severity authentication bypass vulnerability in SoftEther VPN, published on 12 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-27516 exists.\n\nAffected product: SoftEther VPN. 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-2023-27516/ (Markdown: https://insights.sbomify.com/CVE-2023-27516/index.md)","id":"CVE-2023-27516","markdown":"https://insights.sbomify.com/CVE-2023-27516/index.md","name":"CVE-2023-27516","record":{"aliases":["GHSA-cw58-3hpw-976j"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass","account_takeover"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"VPN server software","requires_auth":"none","summary":"An attacker can bypass authentication in SoftEther VPN by sending a specially crafted network packet, gaining unauthorized access to the system.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"talos","cpe":[{"product":"vpn","vendor":"softether"}],"cvss":{"score":7.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-1188","name":"Initialization of a Resource with an Insecure Default"},{"id":"CWE-453","name":"Insecure Default Variable Initialization"}],"description":"An authentication bypass vulnerability exists in the CiRpcAccepted() functionality of SoftEther VPN 4.41-9782-beta and 5.01.9674. A specially crafted network packet can lead to unauthorized access. An attacker can send a network request to trigger this vulnerability.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"Auth bypass in SoftEther VPN","id":"CVE-2023-27516","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2023"},"n_packages":0,"n_references":2,"next":{"headline":"Privilege escalation in Intel(R) Optane(TM) PMem software","id":"CVE-2023-27517"},"packages":[],"prev":{"headline":"Cross-site scripting in Intel(R) DSA software","id":"CVE-2023-27515"},"products":["SoftEther VPN"],"published":"2023-10-12","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2025-25565","kev_date_added":null,"published":"2025-03-12"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2025-25567","kev_date_added":null,"published":"2025-03-12"},{"cvss_score":9.8,"headline":"Use after free in n/a","id":"CVE-2025-25568","kev_date_added":null,"published":"2025-03-12"},{"cvss_score":9,"headline":"Memory corruption in SoftEther VPN","id":"CVE-2023-27395","kev_date_added":null,"published":"2023-10-12"},{"cvss_score":7.8,"headline":"Auth bypass in SoftEther VPN","id":"CVE-2023-32634","kev_date_added":null,"published":"2023-10-12"},{"cvss_score":7.5,"headline":"Integer overflow in SoftEther VPN","id":"CVE-2023-22308","kev_date_added":null,"published":"2023-10-12"},{"cvss_score":7.5,"headline":"Denial of service in SoftEther VPN","id":"CVE-2023-23581","kev_date_added":null,"published":"2023-10-12"}],"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-08-02","vendors":["SoftEther VPN"]},"summary":"An attacker can bypass authentication in SoftEther VPN by sending a specially crafted network packet, gaining unauthorized access to the system.","url":"https://insights.sbomify.com/CVE-2023-27516/"}