{"answers":{"affected":"It affects 4 products.","exploited":"There is no known exploitation of CVE-2024-21378 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2024-21378 yet. Limit exposure of the affected software until one is available.","what":"CVE-2024-21378 is a high-severity code injection vulnerability in Microsoft 365 Apps, published on 13 Feb 2024. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2024-21378 and fix it if it is affected.\n\nWhat it is: CVE-2024-21378 is a high-severity code injection vulnerability in Microsoft 365 Apps, published on 13 Feb 2024. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2024-21378 in the wild and no public exploit code.\n\nAffected product: Microsoft 365 Apps. 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-2024-21378/ (Markdown: https://insights.sbomify.com/CVE-2024-21378/index.md)","id":"CVE-2024-21378","markdown":"https://insights.sbomify.com/CVE-2024-21378/index.md","name":"CVE-2024-21378","record":{"aliases":["GHSA-qm4q-xhjm-67jr"],"analysis":{"component_type":"desktop_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Microsoft Outlook","requires_auth":"low_privilege","summary":"Attackers can execute arbitrary code via Microsoft Outlook, requiring users to apply vendor patches immediately.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"365_apps","vendor":"microsoft"},{"product":"office","vendor":"microsoft"},{"product":"office_long_term_servicing_channel","vendor":"microsoft"},{"product":"outlook","vendor":"microsoft"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"}],"description":"Microsoft Outlook Remote Code Execution Vulnerability","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2024-03-12","github_poc":1,"max_poc_stars":9,"metasploit":0,"nuclei":0,"refs":[{"date":"2024-03-12T14:11:58Z","kind":"github_poc","ref":"https://github.com/d0rb/CVE-2024-21378","stars":9,"title":"This repository contains an exploit for targeting Microsoft Outlook through Exchange Online, leveraging a vulnerability to execute arbitrary code via COM DLLs. The exploit utilizes a modified version of Ruler to send a malicious form as an email, triggering the execution upon user interaction within the Outlook thick client."}],"tier":"poc_unverified"},"has_fix":null,"headline":"Microsoft Outlook Remote Code Execution Vulnerability","id":"CVE-2024-21378","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"microsoft:365_apps","products":["microsoft:365_apps","microsoft:office","microsoft:office_long_term_servicing_channel","microsoft:outlook"],"type":"code_injection","year":"2024"},"n_packages":0,"n_references":1,"next":{"headline":"Microsoft Word Remote Code Execution Vulnerability","id":"CVE-2024-21379"},"packages":[],"prev":{"headline":"Windows DNS Information Disclosure Vulnerability","id":"CVE-2024-21377"},"products":["Microsoft 365 Apps for Enterprise","Microsoft Office 2019","Microsoft Office LTSC 2021","Microsoft Outlook 2016"],"published":"2024-02-13","related":[{"cvss_score":9.8,"headline":"Microsoft Outlook Improper Input Validation","id":"CVE-2024-21413","kev_date_added":"2025-02-06","published":"2024-02-13"},{"cvss_score":9.8,"headline":"Microsoft Office Outlook Privilege Escalation","id":"CVE-2023-23397","kev_date_added":"2023-03-14","published":"2023-03-14"},{"cvss_score":8.8,"headline":"Microsoft Project Remote Code Execution Vulnerability","id":"CVE-2024-38189","kev_date_added":"2024-08-13","published":"2024-08-13"},{"cvss_score":8.8,"headline":"Microsoft Outlook Security Feature Bypass","id":"CVE-2023-35311","kev_date_added":"2023-07-11","published":"2023-07-11"},{"cvss_score":7.8,"headline":"Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision","id":"CVE-2026-21514","kev_date_added":"2026-02-10","published":"2026-02-10"},{"cvss_score":7.8,"headline":"Microsoft Office Security Feature Bypass","id":"CVE-2026-21509","kev_date_added":"2026-01-26","published":"2026-01-26"},{"cvss_score":7.8,"headline":"Microsoft Excel Security Feature Bypass","id":"CVE-2021-42292","kev_date_added":"2021-11-17","published":"2021-11-10"}],"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-10","vendors":["Microsoft"]},"summary":"Attackers can execute arbitrary code via Microsoft Outlook, requiring users to apply vendor patches immediately.","url":"https://insights.sbomify.com/CVE-2024-21378/"}