{"id":"CVE-2026-89028","revision":"46ed40fa07ef4e568622bd182c711b0a","records":[{"revision":"46ed40fa07ef4e568622bd182c711b0a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89028","aliases":[],"title":"MikroTik RouterOS < 7.24 Heap Corruption via SMB1 SessionSetupAndX","description":"MikroTik RouterOS before 7.24 contains a heap memory corruption vulnerability in the userspace SMB daemon that allows remote attackers to corrupt adjacent heap memory by supplying a crafted uniPwdLen value in the SMB1 SessionSetupAndX handler. An attacker can send a malformed SMB1 request with a uniPwdLen field that triggers an integer underflow, causing the resulting value to be used as the copy length in a memory copy operation into a smaller heap buffer, corrupting adjacent heap memory.","state":0,"publishedAt":"2026-09-16T13:12:02.672+00:00","modifiedAt":"2026-10-01T15:21:51.527+00:00","affected":[{"ecosystem":"Vendor product","name":"RouterOS","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unknown\",\n                    \"vendor\": \"MikroTik\",\n                    \"product\": \"RouterOS\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"6.49.18\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"7.0.0\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"7.11.2\"\n                        },\n                        {\n                            \"status\": \"unaffected\",\n                            \"version\": \"7.24.0\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.2,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://forum.mikrotik.com/t/7-24-stable-is-released/272381","https://www.vulncheck.com/advisories/mikrotik-routeros-heap-corruption-via-smb1-sessionsetupandx"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89028","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89028","identifiers":["CVE-2026-89028"]},"retained":false,"historicalAffected":[]}],"coverage":[]}