{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-78439 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-78439 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-78439 is a high-severity memory corruption vulnerability in Microsoft Office 365 for Mac, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-78439 and fix it if it is affected.\n\nWhat it is: CVE-2026-78439 is a high-severity memory corruption vulnerability in Microsoft Office 365 for Mac, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-78439 in the wild and no public exploit code.\n\nAffected product: Microsoft Office 365 for Mac. 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-2026-78439/ (Markdown: https://insights.sbomify.com/CVE-2026-78439/index.md)","id":"CVE-2026-78439","markdown":"https://insights.sbomify.com/CVE-2026-78439/index.md","name":"CVE-2026-78439","record":{"aliases":["GHSA-6cw8-rp4c-jfpf"],"analysis":{"component_type":"desktop_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Microsoft Office","requires_auth":"none","summary":"An attacker can execute arbitrary code remotely via a stack-based buffer overflow in the Microsoft Office Graphics Component.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"description":"Stack-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.","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":"Microsoft Office Graphics Component Remote Code Execution Vulnerability","id":"CVE-2026-78439","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Windows OLE DB Information Disclosure Vulnerability","id":"CVE-2026-78441"},"packages":[],"prev":{"headline":"W3 Total Cache \u003c= 2.10.5 - Unauthenticated Stored Cross-Site Scripting via LazyLoad Background Mutator","id":"CVE-2026-78438"},"products":["Microsoft Office 365 for Mac","Microsoft Office LTSC for Mac 2021","Microsoft Office LTSC for Mac 2024","Microsoft Office for Android"],"published":"2026-09-08","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-10-14","vendors":["Microsoft"]},"summary":"An attacker can execute arbitrary code remotely via a stack-based buffer overflow in the Microsoft Office Graphics Component.","url":"https://insights.sbomify.com/CVE-2026-78439/"}