What is CVE-2018-6522?

CVE-2018-6522 is a high-severity vulnerability in Inca Nprotect Avs, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2018-02-02.

How severe is CVE-2018-6522?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2018-6522 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Inca Nprotect Avs

CVE-2018-6522

In nProtect AVS V4.0 before 4.0.0.39, the driver file (TKRgFtXp.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 0x220408.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-02-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (26.3th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Inca Nprotect Avs

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

References

github.com/ZhiyuanWang-Chengdu-Qihoo360/nProtectAntivirus_POC/tree/master/TKRgF… (Third Party Advisory)
inca.co.kr/include_file/pdf_down/nProtect AVS V4 Vulnerability Response Release… (Vendor Advisory)

Frequently asked questions

What is CVE-2018-6522?: CVE-2018-6522 is a high-severity vulnerability in Inca Nprotect Avs, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2018-02-02.
How severe is CVE-2018-6522?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2018-6522 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.