In nProtect AVS V4.0 before 4.0.0.39, the driver file (TKFsAv.SYS) allows local users to cause a denial of service (BSOD) or possibly have…

published 2018-02-02 8y ago modified 2026-06-17 4mo ago also EUVD-2018-18275

cvss: 7.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 28%
public exploits: 0; none known

In nProtect AVS V4.0 before 4.0.0.39, the driver file (TKFsAv.SYS) allows local users to cause a denial of service (BSOD) or possibly have unspecified other impact because of not validating input values from IOCtl 0x22045c.

Patch / fix

fixed in 1

inca nprotect_avs 4.0.0.39

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Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.8	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.1	AV:L/AC:L/Au:N/C:P/I:P/A:C

Classification

Weakness

CWE-20 Improper Input Validation

References

inca.co.kr /include_file/pdf_down/nProtect%20AVS%20V4%20Vulnerability%20Response%20Release%20Notes.pdf
vendor-advisory
github.com /ZhiyuanWang-Chengdu-Qihoo360/nProtectAntivirus_POC/tree/master/TKFsAv_0x22045c
third-party-advisory

Sources

CVE List CVE-2018-6523
NVD CVE-2018-6523

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