CVE-2026-86380 in PowerProtect Data Domain
Summary
by MITRE • 10/28/2026
Dell PowerProtect Data Domain, Feature Release versions 7.7.1.0 through 8.8, LTS2024 release versions 7.13.1.0 through 7.13.1.80, LTS2025 release versions 8.3.1.0 through 8.3.1.40, LTS2026 release versions 8.6.1.0 through 8.6.1.20, contain an Integer Overflow or Wraparound vulnerability. A high privileged attacker with remote access could potentially exploit this vulnerability, leading to Protection mechanism bypass.
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Analysis
by VulDB Data Team • 10/28/2026
The identified security flaw resides within Dell PowerProtect Data Domain systems across multiple software release tracks including Feature Releases 7.7.1.0 through 8.8 and various Long Term Support releases spanning from LTS2024 version 7.13.1.0 up to 7.13.1.80, as well as LTS2025 versions 8.3.1.0 through 8.3.1.40 and LTS2026 versions 8.6.1.0 through 8.6.1.20. This vulnerability is classified fundamentally as an Integer Overflow or Wraparound issue, which corresponds to Common Weakness Enumeration identifier CWE-190. In the context of data protection appliances like PowerProtect Data Domain, such arithmetic errors typically occur when a variable representing a size, count, or memory offset exceeds its maximum representable value and wraps around to a small positive number rather than triggering an error condition. This behavior allows attackers to manipulate internal logic that relies on these integer values for boundary checks or resource allocation decisions.
The operational impact of this vulnerability is severe because it directly compromises the integrity of protection mechanisms inherent to the storage system. A high privileged attacker who has already obtained remote access can exploit this flaw to bypass critical security controls designed to prevent unauthorized data modification, deletion, or replication manipulation. Since the attacker requires high privileges, this suggests that the initial compromise likely involves credential theft, privilege escalation from a lower-level account, or exploitation of another vulnerability within an authenticated session. Once inside with elevated rights, the integer overflow allows the attacker to trick internal processes into believing they are operating on smaller data structures than actually exist, thereby circumventing checks meant to enforce retention policies, immutability settings, or access control lists. This bypass capability undermines the core value proposition of a Data Domain appliance which is reliable and secure backup storage.
From an adversarial perspective, this exploitation path aligns with techniques found in the MITRE ATT&CK framework, specifically relating to Defense Evasion where attackers modify system configurations or disable security features to maintain persistence and avoid detection. The specific technique involves manipulating internal application logic through malformed inputs that trigger arithmetic wraparound effects, which can be categorized under CWE-20 if it relates to improper input validation leading to the overflow condition. By bypassing protection mechanisms, an attacker could potentially alter backup data integrity, delete critical snapshots without authorization, or interfere with replication processes essential for disaster recovery scenarios. This represents a significant risk to business continuity and regulatory compliance requirements that mandate strict data retention and immutability standards such as WORM (Write Once Read Many) capabilities often found in enterprise storage solutions.
Mitigation strategies must prioritize immediate patching of the affected software versions listed above, ensuring that all systems are updated to releases where this integer overflow has been corrected by Dell Technologies. In addition to applying vendor patches, organizations should enforce strict network segmentation policies to limit remote access to management interfaces and ensure that only authorized administrators have high-privileged accounts on these appliances. Multi-factor authentication should be enabled for all administrative access points to reduce the risk of credential compromise leading to initial exploitation. Furthermore, continuous monitoring of system logs for unusual activity patterns associated with privilege escalation or unexpected changes in protection settings can help detect potential attempts to exploit this vulnerability before significant damage occurs. Regular security assessments and penetration testing focused on authenticated attack vectors are also recommended to identify any residual weaknesses in the authentication and authorization layers that could facilitate access by high-privileged attackers.