{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-22321 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-22321 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-22321 is a medium-severity memory corruption vulnerability in Phoenix Contact FL NAT 2008, published on 18 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-22321 and fix it if it is affected.\n\nWhat it is: CVE-2026-22321 is a medium-severity memory corruption vulnerability in Phoenix Contact FL NAT 2008, published on 18 Mar 2026. 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-2026-22321 in the wild and no public exploit code.\n\nAffected product: Phoenix Contact FL NAT 2008. 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-2026-22321/ (Markdown: https://insights.sbomify.com/CVE-2026-22321/index.md)","id":"CVE-2026-22321","markdown":"https://insights.sbomify.com/CVE-2026-22321/index.md","name":"CVE-2026-22321","record":{"aliases":["GHSA-j66g-mfcw-hrf3"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Industrial network switch","requires_auth":"none","summary":"Unauthenticated attackers can cause a denial of service by sending oversized usernames to the CLI login, crashing the session thread.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CERTVDE","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"description":"A stack-based buffer overflow in the device's Telnet/SSH CLI login routine occurs when a unauthenticated attacker send an oversized or unexpected username input. An overflow condition crashes the thread handling the login attempt, forcing the session to close. Because other CLI sessions remain unaffected, the impact is limited to a low‑severity availability disruption.","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":"Stack-Based Buffer Overflow in CLI Login Username Handling over CLI","id":"CVE-2026-22321","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Stored Cross‑Site Scripting in Link Aggregation Name Handling","id":"CVE-2026-22322"},"packages":[],"prev":{"headline":"Stack-Based Buffer Overflow in TFTP File-Transfer Command Handling over CLI","id":"CVE-2026-22320"},"products":["FL NAT 2008","FL NAT 2208","FL NAT 2304-2GC-2SFP","FL SWITCH 2005","FL SWITCH 2008","FL SWITCH 2008F","FL SWITCH 2016","FL SWITCH 2105","FL SWITCH 2108","FL SWITCH 2116","FL SWITCH 2204-2TC-2SFX","FL SWITCH 2205","FL SWITCH 2206-2FX","FL SWITCH 2206-2FX SM","FL SWITCH 2206-2FX SM ST","FL SWITCH 2206-2FX ST","FL SWITCH 2206-2SFX","FL SWITCH 2206-2SFX PN","FL SWITCH 2206C-2FX","FL SWITCH 2207-FX","FL SWITCH 2207-FX SM","FL SWITCH 2208","FL SWITCH 2208 PN","FL SWITCH 2208C","FL SWITCH 2212-2TC-2SFX","FL SWITCH 2214-2FX","FL SWITCH 2214-2FX SM","FL SWITCH 2214-2SFX","FL SWITCH 2214-2SFX PN","FL SWITCH 2216","FL SWITCH 2216 PN","FL SWITCH 2303-8SP1","FL SWITCH 2304-2GC-2SFP","FL SWITCH 2306-2SFP","FL SWITCH 2306-2SFP PN","FL SWITCH 2308","FL SWITCH 2308 PN","FL SWITCH 2312-2GC-2SFP","FL SWITCH 2314-2SFP","FL SWITCH 2314-2SFP PN","FL SWITCH 2316","FL SWITCH 2316 PN","FL SWITCH 2316/K1","FL SWITCH 2404-2TC-2SFX","FL SWITCH 2406-2SFX","FL SWITCH 2406-2SFX PN","FL SWITCH 2408","FL SWITCH 2408 PN","FL SWITCH 2412-2TC-2SFX","FL SWITCH 2414-2SFX","FL SWITCH 2414-2SFX PN","FL SWITCH 2416","FL SWITCH 2416 PN","FL SWITCH 2504-2GC-2SFP","FL SWITCH 2506-2SFP","FL SWITCH 2506-2SFP PN","FL SWITCH 2506-2SFP/K1","FL SWITCH 2508","FL SWITCH 2508 PN","FL SWITCH 2508/K1","FL SWITCH 2512-2GC-2SFP","FL SWITCH 2514-2SFP","FL SWITCH 2514-2SFP PN","FL SWITCH 2516","FL SWITCH 2516 PN","FL SWITCH 2608","FL SWITCH 2608 PN","FL SWITCH 2708","FL SWITCH 2708 PN","FL SWITCH 5916-8GC-4SFP+","FL SWITCH 5916SFP-8GC-4SFP+","FL SWITCH 5924-4GC","FL SWITCH 5924-4SFP+","FL SWITCH 5924SFP-4GC","FL SWITCH TSN 2312-2GC-2SFP","FL SWITCH TSN 2314-2SFP","FL SWITCH TSN 2316"],"published":"2026-03-18","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-18","vendors":["Phoenix Contact"]},"summary":"Unauthenticated attackers can cause a denial of service by sending oversized usernames to the CLI login, crashing the session thread.","url":"https://insights.sbomify.com/CVE-2026-22321/"}