VDB-329788 · CVE-2021-43768 · EUVD-2021-30675

Malwarebytes for Teams up to 1.0.990 COM Interface mbamservice.exe privileges management

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Malwarebytes for Teams up to 1.0.990 and classified as problematic. This affects an unknown function of the file mbamservice.exe of the component COM Interface. Executing a manipulation can lead to an unknown weakness. This vulnerability appears as CVE-2021-43768. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Malwarebytes for Teams up to 1.0.990. This vulnerability affects an unknown code of the file mbamservice.exe of the component COM Interface. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In Malwarebytes For Teams v.1.0.990 and before and fixed in v.1.0.1003 and later a privilege escalation can occur via the COM interface running in mbamservice.exe.

The advisory is shared for download at hackerone.com. This vulnerability was named CVE-2021-43768 since 11/16/2021. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 1.0.1003 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2021-30675). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Anti-Malware Software

Name

Malwarebytes for Teams

Version

1.0.990

CPE 2.3info

🔒

CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Malwarebytes for Teams 1.0.1003

Timelineinfo

11/16/2021 CVE reserved
10/24/2025 +1437 days Advisory disclosed
10/24/2025 +0 days VulDB entry created
10/25/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: hackerone.com
Status: Confirmed

CVE: CVE-2021-43768 (🔒)
GCVE (CVE): GCVE-0-2021-43768
GCVE (VulDB): GCVE-100-329788
EUVD: 🔒

Entryinfo

Created: 10/24/2025 17:03
Updated: 10/25/2025 01:43
Changes: 10/24/2025 17:03 (54), 10/24/2025 23:32 (1), 10/25/2025 01:43 (2)
Complete: 🔍
Cache ID: 216::103