PowerProtect Data Domain: Improper Certificate Validation
CVE-2026-23776 is a high-severity improper certificate validation vulnerability in PowerProtect Data Domain from Dell, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists versions 8.3.1.30 or later, 7.13.1.70 or later, 8.6.0.0 or later as the first without the flaw, so updating PowerProtect Data Domain to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.23% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update PowerProtect Data Domain to 8.3.1.30 or later or 7.13.1.70 or later or 8.6.0.0 or later or 2.7.9 with DD OS 8.3.1.30, whichever matches your release line, or a later version.
- Update Powerprotect Dp Series Appliance to 2.7.9 or a later version.
- Update Data Domain Operating System to 7.13.1.70 or 8.3.1.30 or 8.6.0.0, whichever matches your release line, or a later version.
- Read the advisory on dell.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Dell | PowerProtect Data Domain | before 8.3.1.30 or later; before 7.13.1.70 or later; before 8.6.0.0 or later; before 2.7.9 with DD OS 8.3.1.30 | 8.3.1.30 or later, 7.13.1.70 or later, 8.6.0.0 or later, 2.7.9 with DD OS 8.3.1.30 |
| Dell | Powerprotect Dp Series Appliance | before 2.7.9 | 2.7.9 |
| Dell | Data Domain Operating System | 7.7.1.0 up to, but not including, 7.13.1.70; 7.14.0.0 up to, but not including, 8.3.1.30; 8.4.0.0 up to, but not including, 8.6.0.0 | 7.13.1.70, 8.3.1.30, 8.6.0.0 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.2 | High | CNA (emc.com) |
| CVSS 3.1 | 8.8 | High | NVD |
Official description
Dell PowerProtect Data Domain with Data Domain Operating System (DD OS) of Feature Release versions 7.7.1.0 through 8.5, LTS2025 release version 8.3.1.0 through 8.3.1.20, LTS2024 release versions 7.13.1.0 through 7.13.1.60, contain(s) an Improper Certificate Validation vulnerability in certificate-based login. A low privileged attacker with remote access could potentially exploit this vulnerability, leading to Elevation of privileges.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Certificate Validation
The product does not validate, or incorrectly validates, a certificate.
How developers prevent this class of flaw
- Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
- If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
More Improper Certificate Validation vulnerabilities (CWE-295)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in PowerProtect Data Domain
- 8.8 High severity
- 7.6 High severity
- 7.2 High severity
- 9.8 Critical severity
- 8.3 High severity
- 7.2 High severity
Recent Improper Certificate Validation vulnerabilities
- 9.8 Critical severity
- 8.8 High severity
- 8.1 High severity
- 9.1 Critical severity
- 7.5 High severity
- 8.2 High severity
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