CVE-2021-4198
CVE-2021-4198 is a medium-severity vulnerability in Bitdefender Antivirus Plus with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.
Key facts
- Severity: Medium (CVSS 3.x base score 6.1)
- CVSS v2: 3.6
- EPSS exploit prediction: 1% (42nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-476
- Affected product: Bitdefender Antivirus Plus
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2021-4198?
- 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.
- How severe is CVE-2021-4198?
- CVE-2021-4198 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
- Is CVE-2021-4198 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-4198?
- CVE-2021-4198 primarily affects Bitdefender Antivirus Plus. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-4198?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-4198 published?
- CVE-2021-4198 was published on 2022-03-07 and last updated on 2026-06-17.
References
- https://www.bitdefender.com/support/security-advisories/messaging_ipc-dll-null-pointer-dereference-in-multiple-bitdefender-products-va-10016/
- https://www.zerodayinitiative.com/advisories/ZDI-22-483/
Affected products (5)
- cpe:2.3:a:bitdefender:antivirus_plus:*:*:*:*:*:*:*:*
- cpe:2.3:a:bitdefender:endpoint_security_tools:*:*:*:*:*:*:*:*
- cpe:2.3:a:bitdefender:internet_security:*:*:*:*:*:*:*:*
- cpe:2.3:a:bitdefender:total_security:*:*:*:*:*:*:*:*
- cpe:2.3:a:bitdefender:vpn_standalone:*:*:*:*:*:*:*:*
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