Vulnerability · Published Mar 22, 2026 · Assigned by VulDB

CVE-2026-4545Flos Freeware Notepad2 PROPSYS.dll uncontrolled search path

High 7.0

In plain English

A high-severity uncontrolled search path in Notepad2 from Flos Freeware. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 3.1)7.0High

Exploit odds (30 days)0.1%top 97.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A security flaw has been discovered in Flos Freeware Notepad2 4.2.25. This affects an unknown function in the library PROPSYS.dll. Performing a manipulation results in uncontrolled search path. The attack is only possible with local access. The attack is considered to have high complexity. The exploitability is reported as difficult. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products (as reported)

Vendor	Product	Versions
Flos Freeware	Notepad2	4.2.25

Weakness: CWE-427, CWE-426 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:R

References

VDB-352372 | Flos Freeware Notepad2 PROPSYS.dll uncontrolled search path vdb-entry
VDB-352372 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #774752 | Flos Freeware Notepad2 4.2.25 Uncontrolled Search Path third-party-advisory
https://drive.google.com/file/d/1o3A3x47B2gi645H02-28qgoIgGN-g6rK/view related