{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21777 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-21777 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21777 is a high-severity vulnerability in EIP Stack Group, published on 17 Jun 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-2021-21777 and fix it if it is affected.\n\nWhat it is: CVE-2021-21777 is a high-severity vulnerability in EIP Stack Group, published on 17 Jun 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-2021-21777 in the wild and no public exploit code.\n\nAffected product: EIP Stack Group. 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-2021-21777/ (Markdown: https://insights.sbomify.com/CVE-2021-21777/index.md)","id":"CVE-2021-21777","markdown":"https://insights.sbomify.com/CVE-2021-21777/index.md","name":"CVE-2021-21777","record":{"aliases":["GHSA-84vv-m336-cjrf"],"analysis":{"component_type":"ics_ot","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Industrial Ethernet/IP stack","requires_auth":"none","summary":"A specially crafted network request in the OpENer Ethernet/IP stack can cause an out-of-bounds read, leading to information disclosure.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"talos","cpe":[{"product":"opener","vendor":"opener_project"}],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.0"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer 2.3 and development commit 8c73bf3. A specially crafted network request can lead to an out-of-bounds read.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Information disclosure in EIP Stack Group","id":"CVE-2021-21777","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Denial of service in MZ Automation\"","id":"CVE-2021-21778"},"packages":[],"prev":{"headline":"Memory corruption in Accusoft","id":"CVE-2021-21776"},"products":["EIP Stack Group"],"published":"2021-06-17","related":[{"cvss_score":10,"headline":"Memory corruption in OpENer","id":"CVE-2022-43604","kev_date_added":null,"published":"2023-03-16"},{"cvss_score":10,"headline":"Memory corruption in OpENer","id":"CVE-2022-43605","kev_date_added":null,"published":"2023-03-16"},{"cvss_score":9.8,"headline":"Integer overflow in n/a","id":"CVE-2026-51540","kev_date_added":null,"published":"2026-07-13"},{"cvss_score":9.8,"headline":"Memory corruption in EIP Stack Group","id":"CVE-2020-13556","kev_date_added":null,"published":"2020-12-11"},{"cvss_score":9.1,"headline":"Integer overflow in n/a","id":"CVE-2026-51536","kev_date_added":null,"published":"2026-07-13"},{"cvss_score":9.1,"headline":"Memory corruption in n/a","id":"CVE-2026-51537","kev_date_added":null,"published":"2026-07-13"},{"cvss_score":9.1,"headline":"Auth bypass in n/a","id":"CVE-2026-51538","kev_date_added":null,"published":"2026-07-13"}],"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 specially crafted network request in the OpENer Ethernet/IP stack can cause an out-of-bounds read, leading to information disclosure.","url":"https://insights.sbomify.com/CVE-2021-21777/"}