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TI-2026-21302 Aliases CVE-2026-26354GHSA-h5cf-xw55-j4wj

Stack-based buffer overflow in Dell PowerProtect Data Domain

Priority MEDIUM 43CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

Dell PowerProtect Data Domain with Domain Operating System (DD OS) of Feature Release versions 7.7.1.0 through 8.6, LTS2025 release version 8.3.1.0 through 8.3.1.10, LTS2024 release versions 7.13.1.0 through 7.13.1.60, contain a stack-based Buffer Overflow vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to arbitrary command execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00504 43rd percentileScored 2026-11-07
Fix Fixed PowerProtect Data Domain (Dell): 8.6.1.10, 8.7.0.0 or later, 8.3.1.20 or later +2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
DellPowerProtect Data Domainbefore 8.6.1.10, 8.7.0.0 or later; before 8.3.1.20 or later; before 7.13.1.60 or later; before 2.7.9 with DD OS 8.3.1.308.6.1.10, 8.7.0.0 or later, 8.3.1.20 or later, 7.13.1.60 or later, 2.7.9 with DD OS 8.3.1.30Patch availableCNA
  • PowerProtect Data Domain VendorDell Affected before 8.6.1.10, 8.7.0.0 or later; before 8.3.1.20 or later; before 7.13.1.60 or later; before 2.7.9 with DD OS 8.3.1.30 Fixed in 8.6.1.10, 8.7.0.0 or later, 8.3.1.20 or later, 7.13.1.60 or later, 2.7.9 with DD OS 8.3.1.30 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:dell:powerprotect_dp_series_appliance:*:*:*:*:*:*:*:*before 2.7.9VulnerableDell
cpe:2.3:o:dell:data_domain_operating_system:*:*:*:*:*:*:*:*7.7.1.0 to before 7.13.1.60; 7.14.0.0 to before 8.3.1.20; 8.4.0.0 to before 8.6.1.10VulnerableDell
  • cpe:2.3:a:dell:powerprotect_dp_series_appliance:*:*:*:*:*:*:*:* Versions before 2.7.9 Vulnerable ·Dell
  • cpe:2.3:o:dell:data_domain_operating_system:*:*:*:*:*:*:*:* Versions 7.7.1.0 to before 7.13.1.60; 7.14.0.0 to before 8.3.1.20; 8.4.0.0 to before 8.6.1.10 Vulnerable ·Dell

Remediation

  • Fix · CNA PowerProtect Data Domain (Dell) Fixed in 8.6.1.10, 8.7.0.0 or later, 8.3.1.20 or later, 7.13.1.60 or later, 2.7.9 with DD OS 8.3.1.30

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Dell PowerProtect Data Domain — dell.com/support/kbdoc/en-us/000450699/dsa-2026-060-securit…

    24 records Highest priority Priority MEDIUM 2 MEDIUM, 22 LOW

    Other records, highest priority first

    • TI-2026-21430 Missing authentication in Dell PowerProtect Data DomainPriority MEDIUM 41
    • TI-2026-19145 Improper certificate validation in Dell PowerProtect Data DomainPriority LOW 39
    • TI-2026-19216 Dell PowerProtect Data Domain with Data Domain Operating System (DD OS) of Feature…Priority LOW 38
    Show all 24 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26354
  2. 2026-10-03 Alias added: GHSA-h5cf-xw55-j4wj
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Advisory 1

  • TI-2026-38564 Improper authentication in Dell PowerProtect Data Domain CVSS 3.1CRITICAL 9.8
  • TI-2026-38562 Path traversal in Dell PowerProtect Data Domain CVSS 3.1CRITICAL 9.8
  • TI-2025-24901 Authentication bypass by spoofing in Dell PowerProtect Data Domain Feature Release CVSS 3.1CRITICAL 9.8
  • TI-2024-24667 OS command injection in Dell PowerProtect DD CVSS 3.1HIGH 8.8
  • TI-2026-21430 Missing authentication in Dell PowerProtect Data Domain CVSS 3.1HIGH 8.8
  • TI-2025-21363 Dell PowerProtect Data Domain with Data Domain Operating System (DD OS) versions prior to… CVSS 3.1HIGH 8.8
See all 99 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences