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Fencer Intel
medium 4.7

CVE-2025-68947 json

NSecsoft NSecKrnl process termination privilege escalation

published 9mo ago modified 4mo ago also EUVD-2025-206286

cvss
4.7
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 3%
public exploits
0
none known

Summary

NSecsoft 'NSecKrnl' is a Windows driver that allows a local, authenticated attacker to terminate processes owned by other users, including SYSTEM and Protected Processes by issuing crafted IOCTL requests to the driver.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa vex VA-26-013-01 updated cvss 4.7

NSecKrnl driver terminates system processes with crafted IOCTL requests

  • NSecsoft NSecKrnl <*
    affected: no fix available “Enable the Windows Vulnerable Driver Blocklist (and WDAC/HVCI where feasible). Monitor for driver and service installation activity that references non-default, user-writable paths.”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
7mo ago

Exploit prediction

0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • hexastrike.com https://hexastrike.com/resources/blog/threat-intelligence/valleyrat-exploiting-byovd-to-kill-endpoint-security/ referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/ANYLNK/NSecSoftBYOVD referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA 4.0 5.7 CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 4.0 5.7 CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/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

Affected products

  • NSecsoft NSecKrnl

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.