{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-34698 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-34698 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-34698 is a high-severity denial of service vulnerability in Cisco Asyncos, published on 6 Oct 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-2021-34698 and fix it if it is affected.\n\nWhat it is: CVE-2021-34698 is a high-severity denial of service vulnerability in Cisco Asyncos, published on 6 Oct 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-2021-34698 in the wild and no public exploit code.\n\nAffected product: Cisco Asyncos. 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-2021-34698/ (Markdown: https://insights.sbomify.com/CVE-2021-34698/index.md)","id":"CVE-2021-34698","markdown":"https://insights.sbomify.com/CVE-2021-34698/index.md","name":"CVE-2021-34698","record":{"aliases":["GHSA-vj66-rqm3-j78p"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Cisco Web Security Appliance","requires_auth":"none","summary":"Unauthenticated remote attackers can cause a denial of service on Cisco Web Security Appliances by exhausting system memory via numerous HTTPS connections.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[{"product":"asyncos","vendor":"cisco"}],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime"}],"description":"A vulnerability in the proxy service of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to exhaust system memory and cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper memory management in the proxy service of an affected device. An attacker could exploit this vulnerability by establishing a large number of HTTPS connections to the affected device. A successful exploit could allow the attacker to cause the system to stop processing new connections, which could result in a DoS condition. Note: Manual intervention may be required to recover from this situation.","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":"Cisco Web Security Appliance Proxy Service Denial of Service Vulnerability","id":"CVE-2021-34698","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"cisco:asyncos","products":["cisco:asyncos"],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Cisco IOS and IOS XE Software TrustSec CLI Parser Denial of Service Vulnerability","id":"CVE-2021-34699"},"packages":[],"prev":{"headline":"Cisco IOS XE Software Protection Against Distributed Denial of Service Attacks Feature Vulnerability","id":"CVE-2021-34697"},"products":["Cisco Web Security Appliance (WSA)"],"published":"2021-10-06","related":[{"cvss_score":10,"headline":"Cisco Multiple Products Improper Input Validation","id":"CVE-2025-20393","kev_date_added":"2025-12-17","published":"2025-12-17"},{"cvss_score":9.8,"headline":"Cisco Secure Email Gateway Relative Path Traversal","id":"CVE-2026-76519","kev_date_added":"2026-10-14","published":"2026-10-14"},{"cvss_score":9.8,"headline":"Cisco Secure Email Gateway SQL Injection","id":"CVE-2026-76461","kev_date_added":"2026-09-14","published":"2026-09-14"},{"cvss_score":8.8,"headline":"Command injection in Cisco Secure Web Appliance","id":"CVE-2024-20435","kev_date_added":null,"published":"2024-07-17"},{"cvss_score":8.8,"headline":"Cisco Web Security Appliance Unauthorized Device Reset Vulnerability","id":"CVE-2019-15956","kev_date_added":null,"published":"2019-11-26"},{"cvss_score":8.6,"headline":"Cisco Email Security Appliance Denial of Service Vulnerability","id":"CVE-2019-1947","kev_date_added":null,"published":"2020-09-23"}],"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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2024-11-07","vendors":["Cisco"]},"summary":"Unauthenticated remote attackers can cause a denial of service on Cisco Web Security Appliances by exhausting system memory via numerous HTTPS connections.","url":"https://insights.sbomify.com/CVE-2021-34698/"}