Affects widely used Dell PowerProtect Data Domain backup appliances; unauthenticated remote RCE can disrupt backups and enterprise operations, making it organization‑wide impactful.
CVE-2026-103780
Unauthenticated remote stack buffer overflow enabling RCE in Dell PowerProtect Data Domain.
Is CVE-2026-103780 being exploited?
Not confirmed. CVE-2026-103780 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.
How severe is CVE-2026-103780?
CVE-2026-103780 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-2026-103780?
Yes. A fix has been recorded for CVE-2026-103780. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-103780 affect?
CVE-2026-103780 affects PowerProtect Data Domain FR 7.7.1.0–8.8, LTS2024 7.13.1.0–7.13.1.80, LTS2025 8.3.1.0–8.3.1.40, LTS2026 8.6.1.0–8.6.1.20. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-103780?
Apply Dell security updates immediately; isolate and restrict network access to affected appliances until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote stack-based buffer overflow allowing remote command execution (RCE); attackers can compromise, exfiltrate, or destroy backups.
Immediate action required
- affected< 8.9.0.0 or later
- affected< 7.13.1.90 or later
- affected< 8.3.1.50 or later
- affected< 8.6.1.30 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.