Dell PowerProtect Data Domain is a widely used enterprise backup appliance; an unauthenticated full takeover can disrupt backups, enable data theft/destruction, or ransomware across organizations.
CVE-2026-53483
Unauthenticated auth bypass in Dell PowerProtect Data Domain enabling full system takeover.
Is CVE-2026-53483 being exploited?
Not confirmed. CVE-2026-53483 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.63% probability of exploitation in the next 30 days.
How severe is CVE-2026-53483?
CVE-2026-53483 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-53483?
Yes. A fix has been recorded for CVE-2026-53483. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-53483 affect?
CVE-2026-53483 affects Dell PowerProtect Data Domain 7.7.1.0 - 8.7, LTS2026: 8.6.1.0 - 8.6.1.10, LTS2025: 8.3.1.0 - 8.3.1.30, LTS2024: 7.13.1.0 - 7.13.1.70. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-53483?
Upgrade to vendor fixed versions immediately; isolate exposed devices until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote attacker can bypass authentication to gain admin/root control, enabling data theft, deletion, tampering, or ransomware on backup appliances.
Immediate action required
- affected< 8.8.0.0 or later
- affected< 8.6.1.20 or later
- affected< 8.3.1.40 or later
- affected< 7.13.1.80 or later
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.