{"id":"CVE-2026-5525","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-5525","generatedAt":"2026-10-28T02:18:50.477Z","title":"A stack-based buffer overflow vulnerability exists in Notepad++ version 8.9.3 in the file drop handler component.","description":"A stack-based buffer overflow vulnerability exists in Notepad++ version 8.9.3 in the file drop handler component. When a user drags and drops a directory path of exactly 259 characters without a trailing backslash, the application appends a backslash and null terminator without proper bounds checking, resulting in a stack buffer overflow and application crash (STATUS_STACK_BUFFER_OVERRUN).","published":"2026-04-10T08:16:26.000Z","lastModified":"2026-10-26T21:10:00.000Z","status":"Analyzed","sourceIdentifier":"33c584b5-0579-4c06-b2a0-8d8329fcab9c","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-121"],"affected":["notepad-plus-plus/notepad\\+\\+"],"epss":{"score":0.00166,"percentile":0.05742,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bfe7514d68bc559534c046c4ef2d1865267aa2b0","tags":["Patch"],"source":"33c584b5-0579-4c06-b2a0-8d8329fcab9c"},{"url":"https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921","tags":["Exploit","Issue Tracking","Mitigation","Vendor Advisory"],"source":"33c584b5-0579-4c06-b2a0-8d8329fcab9c"},{"url":"https://github.com/notepad-plus-plus/notepad-plus-plus/pull/17930","tags":["Issue Tracking","Patch"],"source":"33c584b5-0579-4c06-b2a0-8d8329fcab9c"},{"url":"https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921","tags":["Exploit","Issue Tracking","Mitigation","Vendor Advisory"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-5525","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}