{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25634 exists.","fix":"No fix has been published for CVE-2019-25634 yet. Limit exposure of the affected software until one is available.","what":"CVE-2019-25634 is a high-severity memory corruption vulnerability in 4Mhz Base64 Decoder, published on 24 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-2019-25634 and fix it if it is affected.\n\nWhat it is: CVE-2019-25634 is a high-severity memory corruption vulnerability in 4Mhz Base64 Decoder, published on 24 Mar 2026. 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-2019-25634 exists.\n\nAffected product: 4Mhz Base64 Decoder. 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-2019-25634/ (Markdown: https://insights.sbomify.com/CVE-2019-25634/index.md)","id":"CVE-2019-25634","markdown":"https://insights.sbomify.com/CVE-2019-25634/index.md","name":"CVE-2019-25634","record":{"aliases":["GHSA-cpr2-5chx-jmj3"],"analysis":{"component_type":"desktop_application","fix_type":"no_fix_stated","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Base64 Decoder","requires_auth":"none","summary":"Local attackers can execute arbitrary code via a stack-based buffer overflow in Base64 Decoder by crafting a malicious input file.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"base64_decoder","vendor":"4mhz"}],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"Base64 Decoder 1.1.2 contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by triggering a structured exception handler (SEH) overwrite. Attackers can craft a malicious input file that overflows a buffer, overwrites the SEH chain with a POP-POP-RET gadget address, and uses an egghunter payload to locate and execute shellcode for code execution.","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":"Base64 Decoder 1.1.2 Local Buffer Overflow SEH Egghunter","id":"CVE-2019-25634","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2019"},"n_packages":0,"n_references":4,"next":{"headline":"Zeeways Matrimony CMS Lastest SQL Injection via profile_list","id":"CVE-2019-25635"},"packages":[],"prev":{"headline":"AIDA64 Extreme 5.99.4900 SEH Buffer Overflow via EggHunter","id":"CVE-2019-25633"},"products":["Base64 Decoder"],"published":"2026-03-24","related":[],"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":"total"},"state":"PUBLISHED","updated":"2026-07-15","vendors":["4Mhz"]},"summary":"Local attackers can execute arbitrary code via a stack-based buffer overflow in Base64 Decoder by crafting a malicious input file.","url":"https://insights.sbomify.com/CVE-2019-25634/"}