{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-20048 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-20048 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-20048 is a high-severity denial of service vulnerability in Cisco NX-OS System Software in ACI Mode, published on 25 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-20048 and fix it if it is affected.\n\nWhat it is: CVE-2026-20048 is a high-severity denial of service vulnerability in Cisco NX-OS System Software in ACI Mode, published on 25 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-20048 in the wild and no public exploit code.\n\nAffected product: Cisco NX-OS System Software in ACI Mode. 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-2026-20048/ (Markdown: https://insights.sbomify.com/CVE-2026-20048/index.md)","id":"CVE-2026-20048","markdown":"https://insights.sbomify.com/CVE-2026-20048/index.md","name":"CVE-2026-20048","record":{"aliases":["GHSA-c9vx-x9q2-ffx8"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Cisco Nexus ACI Switch","requires_auth":"low_privilege","summary":"An authenticated remote attacker can cause a kernel panic and device reload by sending continuous SNMP queries to a specific MIB on Cisco Nexus ACI switches.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-789","name":"Memory Allocation with Excessive Size Value"}],"description":"A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to improper processing when parsing SNMP requests. An attacker could exploit this vulnerability by continuously sending SNMP queries\u0026nbsp;to a specific MIB of an affected device. A successful exploit could allow the attacker to cause a kernel panic on the device, resulting in a reload and a\u0026nbsp;DoS condition.\r\nNote: This vulnerability affects SNMP versions 1, 2c, and 3. To exploit\u0026nbsp;this vulnerability through SNMPv1 or\u0026nbsp;SNMPv2c, the attacker must have a valid read-only SNMP community string for the affected system. To exploit this vulnerability through SNMPv3, the attacker must have valid SNMP user credentials for the affected system.","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 NX-OS Software SNMP Denial of Service Vulnerability","id":"CVE-2026-20048","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Denial of service in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software","id":"CVE-2026-20049"},"packages":[],"prev":{"headline":"Cisco Identity Services Engine Cross-Site Scripting Vulnerability","id":"CVE-2026-20047"},"products":["Cisco NX-OS System Software in ACI Mode"],"published":"2026-02-25","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-02-25","vendors":["Cisco"]},"summary":"An authenticated remote attacker can cause a kernel panic and device reload by sending continuous SNMP queries to a specific MIB on Cisco Nexus ACI switches.","url":"https://insights.sbomify.com/CVE-2026-20048/"}