CVE-2026-53477: Dell Command Update (DCU), versions prior to 5.7.1, contain a Time-of-check Time-of-use (TOCTOU) Race Conditio

Q: How do I fix CVE-2026-53477?

command update: upgrade to 5.7.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-53477 being exploited?

CVE-2026-53477 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-2026-53477 affect?

CVE-2026-53477 affects command update. Severity is high (CVSS 7.8). Dell Command Update (DCU), versions prior to 5.7.1, contain a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Elevation of

Routine

HIGH 7.8UPGRADE

CVE-2026-53477 is a high-severity flaw (CVSS 7.8) affecting command update. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Dell Command Update (DCU), versions prior to 5.7.1, contain a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Elevation of Privileges.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 98%)
CISA exploited list	No
Weakness	CWE-367
Published	2026-08-19
Last modified	2026-08-21

Publisher (CNA): Dell · Vendor: dell

Last updated 2026-08-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-19 15:17 UTCPublished CVE record published
2026-08-21 13:41 UTCUpdated Record last modified

dell command update UPGRADE

Affected: < 5.7.1

Fixed in: 5.7.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy command-update || rpm -q command-update || command-update --version

2. UPGRADE to 5.7.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade command-update

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade command-update

Note

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

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-2026-53477?

command update: upgrade to 5.7.1. Exact commands for each OS are on this page.

Is CVE-2026-53477 being exploited?

CVE-2026-53477 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-2026-53477 affect?

CVE-2026-53477 affects command update. Severity is high (CVSS 7.8). Dell Command Update (DCU), versions prior to 5.7.1, contain a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Elevation of

How urgent is CVE-2026-53477?

Priority 28/100. High severity

Software pages

Dell vulnerabilities

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References

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