CVE Explorer
CVE-2026-5525
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).
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Notepad++","vendor":"Notepad++ Project","versions":[{"status":"affected","version":"8.9.3"},{"status":"unaffected","version":"8.9.4"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:6949d9867db6aed344c4c1e25793e6728b139fb43026d7be02764b58dea10fac · sha256:be0e37c86dc8db8b… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":6,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:6949d9867db6aed344c4c1e25793e6728b139fb43026d7be02764b58dea10fac · sha256:be0e37c86dc8db8b… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-121","description":"CWE-121: Stack-based Buffer Overflow","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:6949d9867db6aed344c4c1e25793e6728b139fb43026d7be02764b58dea10fac · sha256:be0e37c86dc8db8b… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"url":"https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bfe7514d68bc559534c046c4ef2d1865267aa2b0"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:6949d9867db6aed344c4c1e25793e6728b139fb43026d7be02764b58dea10fac · sha256:be0e37c86dc8db8b… · /containers/cna/references/2
{"url":"https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:6949d9867db6aed344c4c1e25793e6728b139fb43026d7be02764b58dea10fac · sha256:be0e37c86dc8db8b… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/notepad-plus-plus/notepad-plus-plus/issues/17921"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:6949d9867db6aed344c4c1e25793e6728b139fb43026d7be02764b58dea10fac · sha256:be0e37c86dc8db8b… · /containers/adp/0/references/0
{"url":"https://github.com/notepad-plus-plus/notepad-plus-plus/pull/17930"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:6949d9867db6aed344c4c1e25793e6728b139fb43026d7be02764b58dea10fac · sha256:be0e37c86dc8db8b… · /containers/cna/references/1
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.