CVE-2023-40164 json
Notepad++ global buffer read overflow in nsCodingStateMachine::NextState
published 2023-08-25 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-44771
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
Notepad++ is a free and open-source source code editor. Versions 8.5.6 and prior are vulnerable to global buffer read overflow in `nsCodingStateMachine::NextStater`. The exploitability of this issue is not clear. Potentially, it may be used to leak internal memory allocation information. As of time of publication, no known patches are available in existing versions of Notepad++.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.50% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- securitylab.github.com https://securitylab.github.com/advisories/GHSL-2023-092_Notepad__/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
Affected products
- notepad-plus-plus notepad-plus-plus
Classification
- Weakness
-
- CWE-120 Buffer Copy without Checking Size of Input
References
-
securitylab.github.com
/advisories/GHSL-2023-092_Notepad__/
exploit, third-party-advisory
Sources
- CVE List CVE-2023-40164
- NVD CVE-2023-40164
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