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Description

My Notes Safe 5.3 contains a denial of service vulnerability that allows attackers to crash the application by pasting excessively long character strings 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.

PUBLISHED Reserved 2026-05-16 | Published 2026-05-16 | Updated 2026-05-18 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Memory Allocation with Excessive Size Value

Product status

5.3
affected

Credits

Geovanni Ruiz finder

References

www.exploit-db.com/exploits/49954 (ExploitDB-49954) exploit

www.vulncheck.com/...e-denial-of-service-via-buffer-overflow (VulnCheck Advisory: My Notes Safe 5.3 Denial of Service via Buffer Overflow) third-party-advisory

cve.org (CVE-2021-47971)

nvd.nist.gov (CVE-2021-47971)

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