Symantec DLP Privilege Escalation Vulnerability (CVE-2026-3991) Advisory

Key Vulnerability Summary 1. Vulnerability Overview CVE ID: CVE-2026-3991 Vulnerability Type: Privilege Escalation Severity: High (HIGH) CVSS v3 Score: 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) Description: A privilege escalation vulnerability exists in Symantec Data Loss Prevention (DLP) prior to specific versions. An attacker could exploit this vulnerability to attempt to compromise the software application, thereby gaining elevated access to resources typically protected by the application. 2. Scope of Impact Affected Product: Symantec Data Loss Prevention (DLP) Windows Endpoint Affected Versions: All versions prior to DLP 16.1 MP2 or 25.1 MP1. 3. Remediation Broadcom recommends users upgrade to the following supported versions to remediate this issue: DLP 25.1 MP1 (25.1.00100.60229) DLP 16.1 MP2 (16.1.00200.60431) DLP 16.0 RU2 HP9 (16.0.20000.60589) DLP 16.0 RU1 MP1 HP12 (16.0.10112.60928) DLP 16.0 MP2 HP15 (16.0.00215.62094) Mitigation Recommendations: Restrict access to management systems to authorized users only. Follow the principle of least privilege to limit the impact of potential exploitation. Keep the operating system and applications patched to the latest versions. Implement a multi-layered defense strategy (e.g., firewalls, antivirus software, network intrusion detection systems). 4. POC/Exploit Code The provided screenshot does not contain specific POC code or exploit code.

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Symantec DLP Privilege Escalation Vulnerability (CVE-2026-3991) Advisory