{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-18588","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","state":"PUBLISHED","assignerShortName":"VulDB","dateReserved":"2026-08-02T20:33:29.434Z","datePublished":"2026-08-03T06:00:11.107Z","dateUpdated":"2026-08-03T15:03:20.669Z"},"containers":{"cna":{"providerMetadata":{"orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","shortName":"VulDB","dateUpdated":"2026-08-03T06:00:11.107Z"},"title":"Wavlink WL-NU516U1 nas.cgi fgets stack-based overflow","problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-121","lang":"en","description":"Stack-based Buffer Overflow"}]},{"descriptions":[{"type":"CWE","cweId":"CWE-119","lang":"en","description":"Memory Corruption"}]}],"affected":[{"vendor":"Wavlink","product":"WL-NU516U1","versions":[{"version":"708c073-mt7628","status":"affected"}],"cpes":["cpe:2.3:o:wavlink:wl-nu516u1_firmware:*:*:*:*:*:*:*:*"]}],"descriptions":[{"lang":"en","value":"A vulnerability has been found in Wavlink WL-NU516U1 708c073-mt7628. This affects the function fgets of the file nas.cgi. The manipulation of the argument CONTENT_LENGTH leads to stack-based buffer overflow. Remote exploitation of the attack is possible. You should 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."}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":9.3,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X","baseSeverity":"CRITICAL"}},{"cvssV3_1":{"version":"3.1","baseScore":9.8,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:O/RC:C","baseSeverity":"CRITICAL"}},{"cvssV3_0":{"version":"3.0","baseScore":9.8,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:O/RC:C","baseSeverity":"CRITICAL"}},{"cvssV2_0":{"version":"2.0","baseScore":10,"vectorString":"AV:N/AC:L/Au:N/C:C/I:C/A:C/E:ND/RL:OF/RC:C"}}],"timeline":[{"time":"2026-08-02T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-08-02T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-08-02T22:38:45.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"oduoke (VulDB User)","type":"reporter"},{"lang":"en","value":"VulDB CNA Team","type":"coordinator"}],"references":[{"url":"https://vuldb.com/vuln/385416","name":"VDB-385416 | Wavlink WL-NU516U1 nas.cgi fgets stack-based overflow","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/vuln/385416/cti","name":"VDB-385416 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/cve/CVE-2026-18588","name":"CVE-2026-18588 | CVE Analysis and Report","tags":["third-party-advisory"]},{"url":"https://vuldb.com/submit/850500","name":"Submit #850500 | WAVLINK WL-NU516U1 2026-05-15 (build 708c073-mt7628) Command Injection","tags":["third-party-advisory"]},{"url":"https://github.com/oduoke567/WAVLINK-NU516U1-2026-05-1/blob/main/report2.md","tags":["broken-link"]},{"url":"https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-07-13-4b8a21f-mt7628-squashfs-sysupgrade.bin","tags":["broken-link","patch"]}],"x_generator":["VulDB PVTS v202608"]},"adp":[{"references":[{"url":"https://vuldb.com/submit/850500","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-03T14:59:51.052277Z","id":"CVE-2026-18588","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-03T15:03:20.669Z"}}]}}