{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-3787 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-3787 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-3787 is a high-severity vulnerability in UltraVNC, published on 8 Mar 2026. 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-2026-3787 and fix it if it is affected.\n\nWhat it is: CVE-2026-3787 is a high-severity vulnerability in UltraVNC, published on 8 Mar 2026. 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-2026-3787 in the wild and no public exploit code.\n\nAffected product: UltraVNC. 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-2026-3787/ (Markdown: https://insights.sbomify.com/CVE-2026-3787/index.md)","id":"CVE-2026-3787","markdown":"https://insights.sbomify.com/CVE-2026-3787/index.md","name":"CVE-2026-3787","record":{"aliases":["GHSA-97cv-xr93-496p"],"analysis":{"component_type":"desktop_application","fix_type":"no_fix_stated","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"VNC remote control","requires_auth":"low_privilege","summary":"Local attackers can exploit an uncontrolled search path in UltraVNC's cryptbase.dll to execute arbitrary code, requiring high complexity and local access.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[{"product":"ultravnc","vendor":"uvnc"}],"cvss":{"score":7.3,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-427","name":"Uncontrolled Search Path Element"},{"id":"CWE-426","name":"Untrusted Search Path"}],"description":"A weakness has been identified in UltraVNC 1.6.4.0 on Windows. This affects an unknown function in the library cryptbase.dll of the component Windows Service. This manipulation causes uncontrolled search path. The attack requires local access. A high degree of complexity is needed for the attack. The exploitability is reported as difficult. The vendor was contacted early about this disclosure but did not respond in any way.","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":"UltraVNC Windows Service cryptbase.dll uncontrolled search path","id":"CVE-2026-3787","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"Bytedesk SpringAIOpenrouterRestController SpringAIOpenrouterRestService.java getModels server-side request forgery","id":"CVE-2026-3788"},"packages":[],"prev":{"headline":"EasyCMS Request Parameter RbacuserAction.class.php sql injection","id":"CVE-2026-3786"},"products":["UltraVNC"],"published":"2026-03-08","related":[{"cvss_score":9.8,"headline":"Memory corruption in UltraVNC","id":"CVE-2019-8264","kev_date_added":null,"published":"2019-03-09"},{"cvss_score":9.8,"headline":"Memory corruption in UltraVNC","id":"CVE-2019-8265","kev_date_added":null,"published":"2019-03-09"},{"cvss_score":9.8,"headline":"Memory corruption in UltraVNC","id":"CVE-2019-8266","kev_date_added":null,"published":"2019-03-09"},{"cvss_score":9.8,"headline":"Memory corruption in UltraVNC","id":"CVE-2019-8280","kev_date_added":null,"published":"2019-03-09"},{"cvss_score":9.8,"headline":"Memory corruption in UltraVNC","id":"CVE-2018-15361","kev_date_added":null,"published":"2019-03-05"},{"cvss_score":9.8,"headline":"Integer overflow in UltraVNC","id":"CVE-2019-8260","kev_date_added":null,"published":"2019-03-05"},{"cvss_score":9.8,"headline":"Integer overflow in UltraVNC","id":"CVE-2019-8261","kev_date_added":null,"published":"2019-03-05"}],"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":"2026-03-10","vendors":["n/a"]},"summary":"Local attackers can exploit an uncontrolled search path in UltraVNC's cryptbase.dll to execute arbitrary code, requiring high complexity and local access.","url":"https://insights.sbomify.com/CVE-2026-3787/"}