{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21826 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-21826 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21826 is a high-severity memory corruption vulnerability in AT\u0026T, published on 20 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-21826 and fix it if it is affected.\n\nWhat it is: CVE-2021-21826 is a high-severity memory corruption vulnerability in AT\u0026T, published on 20 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-21826 in the wild and no public exploit code.\n\nAffected product: AT\u0026T. 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-2021-21826/ (Markdown: https://insights.sbomify.com/CVE-2021-21826/index.md)","id":"CVE-2021-21826","markdown":"https://insights.sbomify.com/CVE-2021-21826/index.md","name":"CVE-2021-21826","record":{"aliases":["GHSA-37p7-4jpq-5264"],"analysis":{"component_type":"library","fix_type":"no_fix_stated","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"XMI decompression library","requires_auth":"none","summary":"A heap-based buffer overflow in Xmill allows attackers to execute arbitrary code or cause denial of service via a malicious XMI file.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"talos","cpe":[{"product":"xmill","vendor":"att"}],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"description":"A heap-based buffer overflow vulnerability exists in the XML Decompression DecodeTreeBlock functionality of AT\u0026T Labs Xmill 0.7. Within `DecodeTreeBlock` which is called during the decompression of an XMI file, a UINT32 is loaded from the file and used as trusted input as the length of a buffer. An attacker can provide a malicious file to trigger this vulnerability.","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":"Memory corruption in AT\u0026T","id":"CVE-2021-21826","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Memory corruption in AT\u0026T","id":"CVE-2021-21827"},"packages":[],"prev":{"headline":"Memory corruption in AT\u0026T","id":"CVE-2021-21825"},"products":["AT\u0026T"],"published":"2021-08-20","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2022-26507","kev_date_added":null,"published":"2022-04-14"},{"cvss_score":8.1,"headline":"Memory corruption in AT\u0026T","id":"CVE-2021-21811","kev_date_added":null,"published":"2021-08-31"},{"cvss_score":8.1,"headline":"Memory corruption in AT\u0026T","id":"CVE-2021-21827","kev_date_added":null,"published":"2021-08-20"},{"cvss_score":8.1,"headline":"Memory corruption in AT\u0026T","id":"CVE-2021-21828","kev_date_added":null,"published":"2021-08-20"},{"cvss_score":8.1,"headline":"Memory corruption in AT\u0026T","id":"CVE-2021-21825","kev_date_added":null,"published":"2021-08-18"},{"cvss_score":8.1,"headline":"Memory corruption in AT\u0026T Labs","id":"CVE-2021-21810","kev_date_added":null,"published":"2021-08-17"}],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"A heap-based buffer overflow in Xmill allows attackers to execute arbitrary code or cause denial of service via a malicious XMI file.","url":"https://insights.sbomify.com/CVE-2021-21826/"}