{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-11834 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-11834 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-11834 is a high-severity command injection vulnerability in TP Link Systems Inc. Archer C20 v5, published on 22 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-11834 and fix it if it is affected.\n\nWhat it is: CVE-2026-11834 is a high-severity command injection vulnerability in TP Link Systems Inc. Archer C20 v5, published on 22 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-11834 in the wild and no public exploit code.\n\nAffected product: TP Link Systems Inc. Archer C20 v5. 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-2026-11834/ (Markdown: https://insights.sbomify.com/CVE-2026-11834/index.md)","id":"CVE-2026-11834","markdown":"https://insights.sbomify.com/CVE-2026-11834/index.md","name":"CVE-2026-11834","record":{"aliases":["GHSA-w296-94hj-pfcg"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"TP-Link router","requires_auth":"none","summary":"Adjacent attackers can execute arbitrary commands with elevated privileges on TP-Link routers during initialization via crafted DHCP responses.","user_interaction":"not_required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"TPLink","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"}],"description":"A command\ninjection vulnerability has been identified in the DHCP option processing logic\nin multiple TP-Link router models, due to insufficient validation of externally\nsupplied DHCP option data. An adjacent attacker may exploit this\nvulnerability by supplying crafted DHCP responses, potentially resulting in unauthorized\ncommand execution during device initialization or provisioning workflows. This\ntypically occurs when the device is in a factory-default or unconfigured state.\n\nSuccessful\nexploitation may allow an adjacent, unauthenticated attacker to execute\narbitrary commands with elevated privileges, potentially leading to full\ncompromise of the affected device and unauthorized administrative control.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-06-23","github_poc":1,"max_poc_stars":6,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-06-23T19:41:07Z","kind":"github_poc","ref":"https://github.com/mattgsys/CVE-2026-11834","stars":6,"title":"Proof of Concept (PoC) for the TP-Link DHCP Option 66 Unauthenticated RCE (CVE-2026-11834)"}],"tier":"poc_unverified"},"has_fix":null,"headline":"Unauthenticated Command Injection via DHCP Option Handling in Multiple TP-Link Routers","id":"CVE-2026-11834","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"command_injection","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"Caliptra Update-Reset Secure-Boot Bypass via Attacker-Chosen AXI Staging Address (TOCTOU)","id":"CVE-2026-11835"},"packages":[],"prev":{"headline":"Information disclosure in CI Server","id":"CVE-2026-11833"},"products":["Archer C20 v5","Archer C20 v6","Archer MR200 v07","Archer MR200 v8","Archer MR402 v1","Archer VR2100 v1","TL-MR6400 v7"],"published":"2026-06-22","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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-26","vendors":["TP Link Systems Inc.","TP-Link Systems Inc."]},"summary":"Adjacent attackers can execute arbitrary commands with elevated privileges on TP-Link routers during initialization via crafted DHCP responses.","url":"https://insights.sbomify.com/CVE-2026-11834/"}