{"answers":{"affected":"It affects 2 products.","exploited":"Yes. Attackers have exploited CVE-2021-26411 in the wild since at least 3 Nov 2021, including in ransomware campaigns.","fix":"No fix has been published for CVE-2021-26411 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.","what":"CVE-2021-26411 is a high-severity use after free vulnerability in Microsoft Edge, published on 11 Mar 2021. 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-2021-26411 and fix it if it is affected.\n\nWhat it is: CVE-2021-26411 is a high-severity use after free vulnerability in Microsoft Edge, published on 11 Mar 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: Yes. Attackers have exploited CVE-2021-26411 in the wild since at least 3 Nov 2021, including in ransomware campaigns.\n\nAffected product: Microsoft Edge. 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-2021-26411/ (Markdown: https://insights.sbomify.com/CVE-2021-26411/index.md)","id":"CVE-2021-26411","markdown":"https://insights.sbomify.com/CVE-2021-26411/index.md","name":"CVE-2021-26411","record":{"aliases":["GHSA-c5rh-mmr6-c7ch"],"analysis":{"component_type":"browser","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Internet Explorer browser","requires_auth":"none","summary":"Attackers can exploit a use-after-free flaw in Internet Explorer to execute arbitrary code, requiring users to apply vendor patches.","user_interaction":"required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"edge","vendor":"microsoft"},{"product":"internet_explorer","vendor":"microsoft"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L/E:P/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"Internet Explorer Memory Corruption Vulnerability","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2021-11-22","github_poc":1,"max_poc_stars":2,"metasploit":0,"nuclei":0,"refs":[{"date":"2021-11-22T12:40:10Z","kind":"github_poc","ref":"https://github.com/CrackerCat/CVE-2021-26411","stars":2,"title":null}],"tier":"exploited"},"has_fix":null,"headline":"Microsoft Internet Explorer Memory Corruption","id":"CVE-2021-26411","indexable":true,"kev":{"dateAdded":"2021-11-03","dueDate":"2021-11-17","knownRansomwareCampaignUse":"Known","product":"Internet Explorer","requiredAction":"Apply updates per vendor instructions.","vendorProject":"Microsoft","vulnerabilityName":"Microsoft Internet Explorer Memory Corruption Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"microsoft:edge","products":["microsoft:edge","microsoft:internet_explorer"],"type":"use_after_free","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Microsoft Exchange Server Remote Code Execution Vulnerability","id":"CVE-2021-26412"},"packages":[],"prev":{"headline":"Information disclosure in AMD Radeon™ PRO V520","id":"CVE-2021-26410"},"products":["Internet Explorer 11","Internet Explorer 9","Microsoft Edge (EdgeHTML-based)"],"published":"2021-03-11","related":[{"cvss_score":8.8,"headline":"Microsoft Edge Memory Corruption","id":"CVE-2016-7200","kev_date_added":"2022-03-28","published":"2016-11-10"},{"cvss_score":8.8,"headline":"Microsoft Edge Memory Corruption","id":"CVE-2016-7201","kev_date_added":"2022-03-28","published":"2016-11-10"},{"cvss_score":8.1,"headline":"Microsoft Edge and Internet Explorer Type Confusion","id":"CVE-2017-0037","kev_date_added":"2022-03-28","published":"2017-02-26"},{"cvss_score":6.5,"headline":"Microsoft Internet Explorer and Edge Information Disclosure","id":"CVE-2016-3351","kev_date_added":"2022-05-24","published":"2016-09-14"},{"cvss_score":9.8,"headline":"Memory corruption in Microsoft ChakraCore","id":"CVE-2017-0028","kev_date_added":null,"published":"2017-07-14"},{"cvss_score":9.8,"headline":"ChakraCore RCE Vulnerability","id":"CVE-2017-0223","kev_date_added":null,"published":"2017-05-15"}],"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":"open","licence":"CC0 1.0","name":"CISA KEV"},{"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":"active","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-01","vendors":["Microsoft"]},"summary":"Attackers can exploit a use-after-free flaw in Internet Explorer to execute arbitrary code, requiring users to apply vendor patches.","url":"https://insights.sbomify.com/CVE-2021-26411/"}