{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13539 exists.","fix":"No fix has been published for CVE-2026-13539 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-13539 is a high-severity memory corruption vulnerability in Wavlink WL-NU516U1-A, published on 29 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-13539 and fix it if it is affected.\n\nWhat it is: CVE-2026-13539 is a high-severity memory corruption vulnerability in Wavlink WL-NU516U1-A, published on 29 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13539 exists.\n\nAffected product: Wavlink WL-NU516U1-A. 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-2026-13539/ (Markdown: https://insights.sbomify.com/CVE-2026-13539/index.md)","id":"CVE-2026-13539","markdown":"https://insights.sbomify.com/CVE-2026-13539/index.md","name":"CVE-2026-13539","record":{"aliases":["GHSA-w62x-cjgj-j8jh"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Wavlink wireless router","requires_auth":"low_privilege","summary":"Remote attackers can trigger a stack-based buffer overflow in the wireless configuration handler to execute arbitrary code on Wavlink routers.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"},{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"A vulnerability was identified in Wavlink WL-NU516U1-A M16U1_V240425. The impacted element is the function sub_407504 of the file /cgi-bin/wireless.cgi of the component POST Parameter Handler. Such manipulation of the argument Guest_ssid leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used. It is suggested to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"Wavlink WL-NU516U1-A POST Parameter wireless.cgi sub_407504 stack-based overflow","id":"CVE-2026-13539","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":6,"next":{"headline":"GitBucket RepositoryCreationService.scala Git.cloneRepository.setURI server-side request forgery","id":"CVE-2026-13540"},"packages":[],"prev":{"headline":"Wavlink WL-NU516U1-A POST Parameter wireless.cgi sub_401D68 command injection","id":"CVE-2026-13538"},"products":["WL-NU516U1-A"],"published":"2026-06-29","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":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-29","vendors":["Wavlink"]},"summary":"Remote attackers can trigger a stack-based buffer overflow in the wireless configuration handler to execute arbitrary code on Wavlink routers.","url":"https://insights.sbomify.com/CVE-2026-13539/"}