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Fencer Intel
medium 6.1

CVE-2021-4198 json

messaging_ipc.dll NULL Pointer Dereference in multiple Bitdefender products (VA-10016)

published 4y ago modified 4mo ago also EUVD-2021-34057

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

Summary

A NULL Pointer Dereference vulnerability in the messaging_ipc.dll component as used in Bitdefender Total Security, Internet Security, Antivirus Plus, Endpoint Security Tools, VPN Standalone allows an attacker to arbitrarily crash product processes and generate crashdump files. This issue affects: Bitdefender Total Security versions prior to 26.0.3.29. Bitdefender Internet Security versions prior to 26.0.3.29. Bitdefender Antivirus Plus versions prior to 26.0.3.29. Bitdefender Endpoint Security Tools versions prior to 7.2.2.92. Bitdefender VPN Standalone versions prior to 25.5.0.48.

Patch / fix

  • Bitdefender Total Security 26.0.3.29
  • Bitdefender Internet Security 26.0.3.29
  • Bitdefender Antivirus Plus 26.0.3.29
  • Bitdefender Endpoint Security Tools 7.2.2.92
  • Bitdefender VPN Standalone 25.5.0.48

Is CVE-2021-4198 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
NVD 3.1 6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
NVD 2.0 3.6 AV:L/AC:L/Au:N/C:N/I:P/A:P

Affected products

  • Bitdefender Total Security
  • Bitdefender Internet Security
  • Bitdefender Antivirus Plus
  • Bitdefender Endpoint Security Tools
  • Bitdefender VPN Standalone

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.