Cyber Resilience

CVE-2026-26355

RCE in Dell Data Domain Operating System 7.7.1.0 – 7.13.1.80

RCECommand Injection
Published
03 July 2026
Modified
08 July 2026
Patch / advisory
View advisory
CVSS Score v3.1 6.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
EPSS Score 0.011 61th percentile
Risk Priority 41 floored blend · peak EPSS

Summary

CVE-2026-26355 is a medium-severity OS Command Injection (CWE-78) vulnerability in Dell Data Domain Operating System. Its CVSS base score is 6.5 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 39% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) and SI-2 (Flaw Remediation) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

Dell PowerProtect Data Domain, versions 7.7.1.0 through 8.7, LTS2026 release version 8.6.1.0 through 8.6.1.10, LTS2025 release version 8.3.1.0 through 8.3.1.30, LTS2024 release versions 7.13.1.0 through 7.13.1.70 contain an improper neutralization of special Elements used in an OS command ('OS command…

more

Injection') vulnerability. A high privileged attacker with remote access could potentially exploit this vulnerability, leading to command execution.

CWE(s)
CWE-78

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
Why these techniques?

OS command injection (CWE-78) in a remotely accessible appliance directly enables remote code execution via Unix shell.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-49814Same product: Dell Data Domain Operating System
CVE-2026-53478Same product: Dell Data Domain Operating System
CVE-2026-49815Same product: Dell Data Domain Operating System
CVE-2025-46645Same product: Dell Data Domain Operating System
CVE-2026-53479Same product: Dell Data Domain Operating System
CVE-2026-49813Same product: Dell Data Domain Operating System
CVE-2026-54483Same product: Dell Data Domain Operating System
CVE-2026-35073Same product: Dell Data Domain Operating System
CVE-2025-30099Same product: Dell Data Domain Operating System
CVE-2025-36566Same product: Dell Data Domain Operating System

Affected Assets

dell
data domain operating system
7.7.1.0 — 7.13.1.80 · 8.3.1.0 — 8.3.1.40 · 8.6.1.0 — 8.6.1.20

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • SI-10 Information Input Validation
  • AC-6 Least Privilege
  • SI-2 Flaw Remediation
Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.5
  • V1.2.8
  • V15.2.5

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match
prevent

Directly requires validation and neutralization of untrusted input to block OS command injection (CWE-78) before execution.

AC-6 Least Privilege partial match
prevent

Limits privileges of remote administrative accounts so that even a successful injection yields minimal system impact.

SI-2 Flaw Remediation good match
prevent

Mandates timely patching of the known OS command-injection flaw in the affected Dell PowerProtect releases.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

PR.PS-06's SDLC practices directly require secure coding and input handling that blocks command-injection defects, yet the single broad outcome leaves many specific neutralization vectors and verification gaps unaddressed.

PR.PS-02 partial match
prevents

Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
detects

Security testing and code review target insecure use of operating-system command interfaces, catching command-injection flaws introduced during development.

References