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.
7.6	$0-$5k	1.82-

Summaryinfo

A vulnerability was found in Broadcom Data Loss Prevention up to 16.1 MP1/25.1. It has been rated as critical. This affects an unknown part of the component Windows Endpoint. This manipulation causes inclusion of functionality from untrusted control sphere. This vulnerability is registered as CVE-2026-3991. The attack needs to be launched locally. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Broadcom Data Loss Prevention up to 16.1 MP1/25.1 and classified as critical. Affected by this vulnerability is an unknown function of the component Windows Endpoint. The manipulation with an unknown input leads to a inclusion of functionality from untrusted control sphere vulnerability. The CWE definition for the vulnerability is CWE-829. The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Symantec Data Loss Prevention Windows Endpoint, prior to 25.1 MP1, 16.1 MP2, 16.0 RU2 HF9, 16.0 RU1 MP1 HF12, and 16.0 MP2 HF15, may be susceptible to a Elevation of Privilege vulnerability, which is a type of issue whereby an attacker may attempt to compromise the software application to gain elevated access to resources that are normally protected from an application or user.

The weakness was published by Manuel Feifel. It is possible to read the advisory at support.broadcom.com. This vulnerability is known as CVE-2026-3991 since 03/11/2026. The exploitation appears to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 16.0.00215.62094, 16.0.10112.60928, 16.0.20009.60689, 16.1.00200.60431 or 25.1.00100.60229 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Data Loss Prevention Software

Vendor

• Broadcom

Name

• Data Loss Prevention

Version

• 16.1 MP1
• 25.0
• 25.1

License

• commercial

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (symantec): 🔒

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: Inclusion of functionality from untrusted control sphere
CWE: CWE-829
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
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: Data Loss Prevention 16.0.00215.62094/16.0.10112.60928/16.0.20009.60689/16.1.00200.60431/25.1.00100.60229

Timelineinfo

03/11/2026 CVE reserved
03/30/2026 +18 days Advisory disclosed
03/30/2026 +0 days VulDB entry created
03/30/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: support.broadcom.com
Researcher: Manuel Feifel
Status: Confirmed

CVE: CVE-2026-3991 (🔒)
GCVE (CVE): GCVE-0-2026-3991
GCVE (VulDB): GCVE-100-354235

Entryinfo

Created: 03/30/2026 20:52
Changes: 03/30/2026 20:52 (65)
Complete: 🔍
Cache ID: 216:B02:103

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