{"id":"CVE-2026-1623","published":"2026-01-29T20:32:08Z","modified":"2026-02-23T09:07:06Z","title":"Totolink A7000R cstecgi.cgi setUpgradeFW command injection","vendor":"Totolink","product":"A7000R","tier":"core","eol":null,"affectedVersions":[{"vendor":"Totolink","product":"A7000R","versions":["4.1cu.4154"]}],"description":{"text":"A weakness has been identified in Totolink A7000R 4.1cu.4154. Impacted is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument FileName causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.","provenance":"source","from":"CVE.org"},"summary":null,"cvss":{"score":6.3,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.02388,"percentile":0.83929,"date":"2026-10-30","provenance":"source"},"kev":null,"vulncheckKev":{"dateAdded":"2026-07-30","exploitedFirstSeen":"2026-07-30","ransomware":false,"evidence":[{"url":"https://previdian.com/CVE-2026-1623","date":"2026-07-30"}],"evidenceTotal":1,"provenance":"source"},"exploited":true,"otx":{"pulseCount":0,"pulses":[],"provenance":"machine"},"cwes":[{"id":"CWE-77","name":"Improper Neutralization of Special Elements used in a Command"},{"id":"CWE-74","name":"Improper Neutralization of Special Elements in Output Used by a Downstream Component"}],"references":[{"url":"https://vuldb.com/?id.343382","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/?ctiid.343382","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/?submit.740767","tags":["third-party-advisory"]},{"url":"https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/04_RCE_setUpgradeFW_RCE.md","tags":["exploit","patch"]},{"url":"https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/04_RCE_setUpgradeFW_RCE.md#poc","tags":["exploit","patch"]},{"url":"https://www.totolink.net/","tags":["product"]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-4962","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-4962","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":["https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/04_RCE_setUpgradeFW_RCE.md","https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/04_RCE_setUpgradeFW_RCE.md#poc"],"flow":[],"timeline":[{"date":"2026-01-29","kind":"published","label":"Published (CVE.org)","url":"https://www.cve.org/CVERecord?id=CVE-2026-1623","provenance":"source"},{"date":"2026-07-30","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://previdian.com/CVE-2026-1623","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":null},"priority":{"score":66.2,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in VulnCheck KEV"},{"name":"Recent KEV listing","points":5.0,"detail":"added 93 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":16.79,"detail":"percentile 0.8393"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"2 NVD references tagged Exploit"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":4.41,"detail":"base score 6.3"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}