Flos Freeware Notepad2 PROPSYS.dll uncontrolled search path

published 2026-03-22 7mo ago modified 2026-06-17 4mo ago also EUVD-2026-14299

cvss: 7.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits: 0; none known

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.

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CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 7mo ago (2026-03-24)

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	4.0	7.3	CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X
CNA	3.1	7.0	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
CNA	3.0	7.0	CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:R
CNA	2.0	6.0	AV:L/AC:H/Au:S/C:C/I:C/A:C/E:ND/RL:ND/RC:UR
CNA	4.0	7.3	CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	7.0	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	2.0	6.0	AV:L/AC:H/Au:S/C:C/I:C/A:C

Affected products

Flos Freeware Notepad2

Classification

Weakness

CWE-427 Uncontrolled Search Path Element
CWE-426 Untrusted Search Path

References

vuldb.com /?id.352372
vdb-entry, third-party-advisory
vuldb.com /?ctiid.352372
signature, permissions-required
vuldb.com /?submit.774752
third-party-advisory, vdb-entry
drive.google.com /file/d/1o3A3x47B2gi645H02-28qgoIgGN-g6rK/view
related, permissions-required

Sources

CVE List CVE-2026-4545
NVD CVE-2026-4545

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