CVE-2021-3576

Name: CVE-2021-3576
Creator: NVD / NIST
Published: 2021-10-28T14:15:08.617+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.94%

Last modified Jun 17, 2026

CVE-2021-3576 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Execution with Unnecessary Privileges vulnerability in Bitdefender Endpoint Security Tools, Total Security allows a local attacker to elevate to 'NT AUTHORITY\System. Impersonation enables the server thread to perform actions on behalf of the client but within the limits of the client's security context. EPSS estimates a 0.94% chance of exploitation in the next 30 days.

Description

Execution with Unnecessary Privileges vulnerability in Bitdefender Endpoint Security Tools, Total Security allows a local attacker to elevate to 'NT AUTHORITY\System. Impersonation enables the server thread to perform actions on behalf of the client but within the limits of the client's security context. This issue affects: Bitdefender Endpoint Security Tools versions prior to 7.2.1.65. Bitdefender Total Security versions prior to 25.0.26.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.94%

56.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Bitdefender	Endpoint Security Tools	< 7.2.1.65
Bitdefender	Total Security	< 25.0.26

References

https://www.bitdefender.com/support/security-advisories/privilege-escalation-via-seimpersonateprivilege-in-bitdefender-endpoint-security-tools-va-9848/Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1276/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-21-1376/Third Party Advisory, VDB Entry
https://www.bitdefender.com/support/security-advisories/privilege-escalation-via-seimpersonateprivilege-in-bitdefender-endpoint-security-tools-va-9848/Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1276/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-21-1376/Third Party Advisory, VDB Entry

Timeline

Published: Oct 28, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3576?

How severe is CVE-2021-3576?

CVE-2021-3576 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.94% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3576?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-3576?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST