What’s Vulnerable › Vulnerabilities

CVE-2021-47944: memono Notepad 4.2 Denial of Service via Buffer Overflow

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-10 · updated 2026-07-25
• Weakness: CWE-789

Description

memono Notepad 4.2 contains a denial of service vulnerability that allows attackers to crash the application by pasting excessively long character buffers into note fields. Attackers can generate a payload containing 350000 repeated characters and paste it twice into a new note to trigger an application crash on iOS devices.

Affected products

• memono Notepad: 4.2

References

• https://www.exploit-db.com/exploits/49977
• https://www.vulncheck.com/advisories/memono-notepad-denial-of-service-via-buffer-overflow

Get alerted when CVE-2021-47944 or the next vulnerability affects your stack