What is CVE-2026-86377?

CVE-2026-86377 is a high-severity vulnerability in Dell Powerprotect Data Domain, classified under Out-of-bounds Write. CVSS score: 7.6/10. Published 2026-10-28.

How severe is CVE-2026-86377?

High severity. CVSS v3 base score is 7.6 out of 10.

Buffer overflow in Dell Powerprotect Data Domain

CVE-2026-86377

Dell PowerProtect Data Domain, Feature Release versions 7.7.1.0 through 8.8, LTS2024 release versions 7.13.1.0 through 7.13.1.80, LTS2025 release versions 8.3.1.0 through 8.3.1.40, LTS2026 release versions 8.6.1.0 through 8.6.1.20, contain an Out-of-bounds Write vulnerability. A low privileged attacker with remote access could potentially exploit this vulnerability, leading to Denial of service.

Vulnerability class: Buffer Overflow

Published 2026-10-28 · last modified 2026-10-29.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Dell Powerprotect Data Domain

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.dell.com/support/kbdoc/en-us/000515178/dsa-2026-416-security-update-for-del… (vendor-advisory)

Frequently asked questions

What is CVE-2026-86377?: CVE-2026-86377 is a high-severity vulnerability in Dell Powerprotect Data Domain, classified under Out-of-bounds Write. CVSS score: 7.6/10. Published 2026-10-28.
How severe is CVE-2026-86377?: High severity. CVSS v3 base score is 7.6 out of 10.