{"answers":{"affected":"It affects 2 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-0834 exists.","fix":"No fix has been published for CVE-2026-0834 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-0834 is a high-severity missing authorization vulnerability in TP Link Systems Inc. Archer C20 V5, published on 21 Jan 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-2026-0834 and fix it if it is affected.\n\nWhat it is: CVE-2026-0834 is a high-severity missing authorization vulnerability in TP Link Systems Inc. Archer C20 V5, published on 21 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-0834 exists.\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-2026-0834/ (Markdown: https://insights.sbomify.com/CVE-2026-0834/index.md)","id":"CVE-2026-0834","markdown":"https://insights.sbomify.com/CVE-2026-0834/index.md","name":"CVE-2026-0834","record":{"aliases":["GHSA-cpr3-8r3m-jjf4"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["denial_of_service","data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"TP-Link wireless router","requires_auth":"none","summary":"Unauthenticated adjacent attackers can execute administrative commands like factory reset and reboot on TP-Link routers, causing service disruption and configuration loss.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"TPLink","cpe":[{"product":"archer_ax53_firmware","vendor":"tp-link"},{"product":"archer_c20_firmware","vendor":"tp-link"}],"cvss":{"score":7.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-290","name":"Authentication Bypass by Spoofing"}],"description":"Logic vulnerability in TP-Link Archer C20 v5, 6.0, Archer AX53 v1.0 and TL-WR841N v13 (TDDP module) allows unauthenticated adjacent attackers to execute administrative commands including factory reset and device reboot without credentials. Attackers on the adjacent network can remotely trigger factory resets and reboots without credentials, causing configuration loss and interruption of device availability.\n\nThis issue affects Archer C20 v6.0 \u003c V6_251031, Archer C20 v5 \u003cEU_V5_260317 or \u003c US_V5_260419\n\nArcher AX53 v1.0 \u003c \n\nV1_251215\n\nTL-WR841N v13 \u003c 0.9.1 Build 20231120 Rel.62366","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-01-12","github_poc":1,"max_poc_stars":6,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-01-12T21:01:13Z","kind":"github_poc","ref":"https://github.com/mattgsys/CVE-2026-0834","stars":6,"title":"Proof of Concept (PoC) for the TP-Link Device Debug Protocol (TDDP) Authentication Bypass (CVE-2026-0834)"}],"tier":"weaponised"},"has_fix":null,"headline":"Logic Vulnerability on TP-Link Archer C20, Archer AX53 and TL-WR841N v13","id":"CVE-2026-0834","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":0,"n_references":7,"next":{"headline":"Cross-site scripting in Sterling B2B Integrator","id":"CVE-2026-0835"},"packages":[],"prev":{"headline":"Team Section Block \u003c= 2.0.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Social Network Link","id":"CVE-2026-0833"},"products":["Archer C20 V5","Archer C20 v6.0, Archer AX53 v1.0","TL-WR841N v13"],"published":"2026-01-21","related":[{"cvss_score":8.6,"headline":"Heap-based Buffer Overflow Vulnerability in Archer AX53 and AX12","id":"CVE-2025-62673","kev_date_added":null,"published":"2026-02-03"},{"cvss_score":8.5,"headline":"OS Command Injection Vulnerability in OpenVPN Module in TP-Link AX53","id":"CVE-2026-30815","kev_date_added":null,"published":"2026-04-08"},{"cvss_score":8.5,"headline":"OS Command Injection Vulnerability in dnsmasq Module in TP-Link AX53","id":"CVE-2026-30818","kev_date_added":null,"published":"2026-04-08"},{"cvss_score":7.7,"headline":"Buffer Overflow in Network Probe Handling Function of TP-Link Archer AX53 + Archer AX55","id":"CVE-2025-15608","kev_date_added":null,"published":"2026-03-20"},{"cvss_score":7.3,"headline":"Buffer Overflow Vulnerability in TP-Link AX53","id":"CVE-2026-30814","kev_date_added":null,"published":"2026-04-08"},{"cvss_score":7.3,"headline":"Authenticated Command Injection in mcsd Service of TP-Link Archer AX53","id":"CVE-2025-15607","kev_date_added":null,"published":"2026-03-20"},{"cvss_score":7.3,"headline":"Heap-based Buffer Overflow Vulnerability in TP-Link Archer AX53","id":"CVE-2025-58077","kev_date_added":null,"published":"2026-02-03"}],"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-04-28","vendors":["TP Link Systems Inc.","TP-Link Systems Inc."]},"summary":"Unauthenticated adjacent attackers can execute administrative commands like factory reset and reboot on TP-Link routers, causing service disruption and configuration loss.","url":"https://insights.sbomify.com/CVE-2026-0834/"}