{"answers":{"affected":"It affects 209 products.","exploited":"There is no known exploitation of CVE-2021-34739 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-34739 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-34739 is a high-severity authentication bypass vulnerability in Cisco Small Business Smart and Managed Switches, published on 4 Nov 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-2021-34739 and fix it if it is affected.\n\nWhat it is: CVE-2021-34739 is a high-severity authentication bypass vulnerability in Cisco Small Business Smart and Managed Switches, published on 4 Nov 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-2021-34739 in the wild and no public exploit code.\n\nAffected product: Cisco Small Business Smart and Managed Switches. 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-2021-34739/ (Markdown: https://insights.sbomify.com/CVE-2021-34739/index.md)","id":"CVE-2021-34739","markdown":"https://insights.sbomify.com/CVE-2021-34739/index.md","name":"CVE-2021-34739","record":{"aliases":["GHSA-5fmw-qrmv-x2mw"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["privilege_escalation","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Cisco Small Business Switch","requires_auth":"none","summary":"An attacker can replay intercepted session credentials to gain unauthorized administrator access to the web management interface of Cisco Small Business switches.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[{"product":"cbs250-16p-2g_firmware","vendor":"cisco"},{"product":"cbs250-16t-2g_firmware","vendor":"cisco"},{"product":"cbs250-24fp-4g_firmware","vendor":"cisco"},{"product":"cbs250-24fp-4x_firmware","vendor":"cisco"},{"product":"cbs250-24p-4g_firmware","vendor":"cisco"},{"product":"cbs250-24p-4x_firmware","vendor":"cisco"},{"product":"cbs250-24pp-4g_firmware","vendor":"cisco"},{"product":"cbs250-24t-4g_firmware","vendor":"cisco"},{"product":"cbs250-24t-4x_firmware","vendor":"cisco"},{"product":"cbs250-48p-4g_firmware","vendor":"cisco"},{"product":"cbs250-48p-4x_firmware","vendor":"cisco"},{"product":"cbs250-48pp-4g_firmware","vendor":"cisco"},{"product":"cbs250-48t-4g_firmware","vendor":"cisco"},{"product":"cbs250-48t-4x_firmware","vendor":"cisco"},{"product":"cbs250-8fp-e-2g_firmware","vendor":"cisco"},{"product":"cbs250-8p-e-2g_firmware","vendor":"cisco"},{"product":"cbs250-8pp-d_firmware","vendor":"cisco"},{"product":"cbs250-8pp-e-2g_firmware","vendor":"cisco"},{"product":"cbs250-8t-d_firmware","vendor":"cisco"},{"product":"cbs250-8t-e-2g_firmware","vendor":"cisco"},{"product":"cbs350-12np-4x_firmware","vendor":"cisco"},{"product":"cbs350-12xs_firmware","vendor":"cisco"},{"product":"cbs350-12xt_firmware","vendor":"cisco"},{"product":"cbs350-16fp-2g_firmware","vendor":"cisco"},{"product":"cbs350-16p-2g_firmware","vendor":"cisco"},{"product":"cbs350-16p-e-2g_firmware","vendor":"cisco"},{"product":"cbs350-16t-2g_firmware","vendor":"cisco"},{"product":"cbs350-16t-e-2g_firmware","vendor":"cisco"},{"product":"cbs350-16xts_firmware","vendor":"cisco"},{"product":"cbs350-24fp-4g_firmware","vendor":"cisco"},{"product":"cbs350-24fp-4x_firmware","vendor":"cisco"},{"product":"cbs350-24mgp-4x_firmware","vendor":"cisco"},{"product":"cbs350-24ngp-4x_firmware","vendor":"cisco"},{"product":"cbs350-24p-4g_firmware","vendor":"cisco"},{"product":"cbs350-24p-4x_firmware","vendor":"cisco"},{"product":"cbs350-24s-4g_firmware","vendor":"cisco"},{"product":"cbs350-24t-4g_firmware","vendor":"cisco"},{"product":"cbs350-24t-4x_firmware","vendor":"cisco"},{"product":"cbs350-24xs_firmware","vendor":"cisco"},{"product":"cbs350-24xt_firmware","vendor":"cisco"},{"product":"cbs350-24xts_firmware","vendor":"cisco"},{"product":"cbs350-48fp-4g_firmware","vendor":"cisco"},{"product":"cbs350-48fp-4x_firmware","vendor":"cisco"},{"product":"cbs350-48ngp-4x_firmware","vendor":"cisco"},{"product":"cbs350-48p-4g_firmware","vendor":"cisco"},{"product":"cbs350-48p-4x_firmware","vendor":"cisco"},{"product":"cbs350-48t-4g_firmware","vendor":"cisco"},{"product":"cbs350-48t-4x_firmware","vendor":"cisco"},{"product":"cbs350-48xt-4x_firmware","vendor":"cisco"},{"product":"cbs350-8fp-2g_firmware","vendor":"cisco"},{"product":"cbs350-8fp-e-2g_firmware","vendor":"cisco"},{"product":"cbs350-8mgp-2x_firmware","vendor":"cisco"},{"product":"cbs350-8mp-2x_firmware","vendor":"cisco"},{"product":"cbs350-8p-2g_firmware","vendor":"cisco"},{"product":"cbs350-8p-e-2g_firmware","vendor":"cisco"},{"product":"cbs350-8s-e-2g_firmware","vendor":"cisco"},{"product":"cbs350-8t-e-2g_firmware","vendor":"cisco"},{"product":"cbs350-8xt_firmware","vendor":"cisco"},{"product":"esw2-350g-52_firmware","vendor":"cisco"},{"product":"esw2-350g-52dc_firmware","vendor":"cisco"},{"product":"esw2-550x-48_firmware","vendor":"cisco"},{"product":"esw2-550x-48dc_firmware","vendor":"cisco"},{"product":"sf200-24_firmware","vendor":"cisco"},{"product":"sf200-24fp_firmware","vendor":"cisco"},{"product":"sf200-24p_firmware","vendor":"cisco"},{"product":"sf200-48_firmware","vendor":"cisco"},{"product":"sf200-48p_firmware","vendor":"cisco"},{"product":"sf250-08_firmware","vendor":"cisco"},{"product":"sf250-08hp_firmware","vendor":"cisco"},{"product":"sf250-10p_firmware","vendor":"cisco"},{"product":"sf250-18_firmware","vendor":"cisco"},{"product":"sf250-24_firmware","vendor":"cisco"},{"product":"sf250-24p_firmware","vendor":"cisco"},{"product":"sf250-26_firmware","vendor":"cisco"},{"product":"sf250-26hp_firmware","vendor":"cisco"},{"product":"sf250-26p_firmware","vendor":"cisco"},{"product":"sf250-48_firmware","vendor":"cisco"},{"product":"sf250-48hp_firmware","vendor":"cisco"},{"product":"sf250-50_firmware","vendor":"cisco"},{"product":"sf250-50hp_firmware","vendor":"cisco"},{"product":"sf250-50p_firmware","vendor":"cisco"},{"product":"sf250x-24_firmware","vendor":"cisco"},{"product":"sf250x-24p_firmware","vendor":"cisco"},{"product":"sf250x-48_firmware","vendor":"cisco"},{"product":"sf250x-48p_firmware","vendor":"cisco"},{"product":"sf300-08_firmware","vendor":"cisco"},{"product":"sf300-24_firmware","vendor":"cisco"},{"product":"sf300-24mp_firmware","vendor":"cisco"},{"product":"sf300-24p_firmware","vendor":"cisco"},{"product":"sf300-24pp_firmware","vendor":"cisco"},{"product":"sf300-48_firmware","vendor":"cisco"},{"product":"sf300-48p_firmware","vendor":"ci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Insufficient Session Expiration"}],"description":"A vulnerability in the web-based management interface of multiple Cisco Small Business Series Switches could allow an unauthenticated, remote attacker to replay valid user session credentials and gain unauthorized access to the web-based management interface of an affected device. This vulnerability is due to insufficient expiration of session credentials. An attacker could exploit this vulnerability by conducting a man-in-the-middle attack against an affected device to intercept valid session credentials and then replaying the intercepted credentials toward the same device at a later time. A successful exploit could allow the attacker to access the web-based management interface with administrator privileges.","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 Small Business Series Switches Session Credentials Replay Vulnerability","id":"CVE-2021-34739","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Cisco Aironet Access Points WLAN Control Protocol Packet Buffer Leak Denial of Service Vulnerability","id":"CVE-2021-34740"},"packages":[],"prev":{"headline":"Cisco Identity Services Engine Cross-Site Scripting Vulnerabilities","id":"CVE-2021-34738"},"products":["Cisco Small Business Smart and Managed Switches"],"published":"2021-11-04","related":[{"cvss_score":5.8,"headline":"Security feature bypass in Cisco Small Business Smart and Managed Switches","id":"CVE-2024-20263","kev_date_added":null,"published":"2024-01-26"}],"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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2024-11-07","vendors":["Cisco"]},"summary":"An attacker can replay intercepted session credentials to gain unauthorized administrator access to the web management interface of Cisco Small Business switches.","url":"https://insights.sbomify.com/CVE-2021-34739/"}