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Fencer Vulns
medium 6.8

CVE-2021-34546 json

An unauthenticated attacker with physical access to a computer with NetSetMan Pro before 5.0 installed, that has the pre-logon profile swit…

published 2021-06-10 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21198

cvss
6.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

An unauthenticated attacker with physical access to a computer with NetSetMan Pro before 5.0 installed, that has the pre-logon profile switch button within the Windows logon screen enabled, is able to drop to an administrative shell and execute arbitrary commands as SYSTEM via the "save log to file" feature. To accomplish this, the attacker can navigate to cmd.exe.

Patch / fix

  • netsetman netsetman 5.0

Exploit prediction

0.69% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • secuvera.de https://www.secuvera.de/advisories/secuvera-SA-2021-01.txt referenced PoC, tagged "exploit" by a source, unverified
  • seclists.org http://seclists.org/fulldisclosure/2021/Jun/17 referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/163097/NetSetManPro-4.7.2-Privilege-Escalation.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.8 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

References

Sources

Fencer Vulns 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.