CVE-2026-28263: Dell PowerProtect Data Domain with Data Domain Operating System (DD OS) of Feature Release versions 7.7.1.0 th

Q: How do I fix CVE-2026-28263?

powerprotect data domain: upgrade to newer than 8.3.1.20; data domain operating system: upgrade to newer than 8.5.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-28263 being exploited?

CVE-2026-28263 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-28263 affect?

CVE-2026-28263 affects powerprotect data domain, data domain operating system. Severity is medium (CVSS 5.9). Dell PowerProtect Data Domain with Data Domain Operating System (DD OS) of Feature Release versions 7.7.1.0 through 8.5, LTS2025 release version 8.3.1.0 through 8.3.1.20, LTS2024 release versions 7.13.1.0 through 7.13.1.50, contain a cross-

Q: How urgent is CVE-2026-28263?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 5.9UPGRADEUPGRADE

CVE-2026-28263 is a medium-severity flaw (CVSS 5.9) affecting powerprotect data domain, data domain operating system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Dell PowerProtect Data Domain with Data Domain Operating System (DD OS) of Feature Release versions 7.7.1.0 through 8.5, LTS2025 release version 8.3.1.0 through 8.3.1.20, LTS2024 release versions 7.13.1.0 through 7.13.1.50, contain a cross-site Scripting vulnerability. A high privileged attacker with remote access could potentially exploit this vulnerability, leading to Script injection.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-17
Last modified	2026-10-26

Publisher (CNA): Dell · Vendor: dell

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-17 12:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

dell powerprotect data domain UPGRADE

Affected: >= 7.13.1.0 and <= 7.13.1.50 · >= 8.3.1.0 and <= 8.3.1.20

Fixed in: newer than 8.3.1.20

Safe to downgrade to: a release before 7.13.1.0

1. Check installed version

apt-cache policy powerprotect-data-domain || rpm -q powerprotect-data-domain || powerprotect-data-domain --version

2. UPGRADE to newer than 8.3.1.20 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade powerprotect-data-domain

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade powerprotect-data-domain

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 7.13.1.0 (Debian / Ubuntu)

apt-cache madison powerprotect-data-domain sudo apt install powerprotect-data-domain=<VERSION_BEFORE_7.13.1.0> sudo apt-mark hold powerprotect-data-domain

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list powerprotect-data-domain sudo dnf downgrade powerprotect-data-domain-<VERSION_BEFORE_7.13.1.0> sudo dnf versionlock add powerprotect-data-domain

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

dell data domain operating system UPGRADE

Affected: >= 7.7.1.0 and <= 8.5.0.0

Fixed in: newer than 8.5.0.0

Safe to downgrade to: a release before 7.7.1.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-28263?

powerprotect data domain: upgrade to newer than 8.3.1.20; data domain operating system: upgrade to newer than 8.5.0.0. Exact commands for each OS are on this page.

Is CVE-2026-28263 being exploited?

CVE-2026-28263 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-28263 affect?

CVE-2026-28263 affects powerprotect data domain, data domain operating system. Severity is medium (CVSS 5.9). Dell PowerProtect Data Domain with Data Domain Operating System (DD OS) of Feature Release versions 7.7.1.0 through 8.5, LTS2025 release version 8.3.1.0 through 8.3.1.20, LTS2024 release versions 7.13.1.0 through 7.13.1.50, contain a cross-

How urgent is CVE-2026-28263?

Priority 23/100. No elevated risk signals yet.

Software pages

Dell vulnerabilities

Related CVEs

CVE-2026-23777 MEDIUM 4.3 UPGRADE UPGRADE Dell PowerProtect Data Domain with Data Domain Operating System (DD OS) of Feature Release versions 7.7.1.0 th

References

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