CVE-2026-40636: Dell ECS versions 3.8.1.0 through 3.8.1.7 and Dell ObjectScale versions prior to 4.3.0.0, contains a use of ha

Q: How do I fix CVE-2026-40636?

elastic cloud storage: upgrade to 4.3.0.0; objectscale: upgrade to 4.3.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-40636 being exploited?

CVE-2026-40636 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-2026-40636 affect?

CVE-2026-40636 affects elastic cloud storage, objectscale. Severity is critical (CVSS 9.8). Dell ECS versions 3.8.1.0 through 3.8.1.7 and Dell ObjectScale versions prior to 4.3.0.0, contains a use of hard-coded credentials vulnerability. An unauthenticated attacker with local access could potentially exploit this vulnerability, le

Q: How urgent is CVE-2026-40636?

Priority 43/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADEUPGRADE

CVE-2026-40636 is a critical-severity flaw (CVSS 9.8) affecting elastic cloud storage, objectscale. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Dell ECS versions 3.8.1.0 through 3.8.1.7 and Dell ObjectScale versions prior to 4.3.0.0, contains a use of hard-coded credentials vulnerability. An unauthenticated attacker with local access could potentially exploit this vulnerability, leading to filesystem access for attacker.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-798
Published	2026-05-11
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

2026-05-11 10:16 UTCPublished CVE record published
2026-10-26 18:10 UTCUpdated Record last modified

dell elastic cloud storage UPGRADE

Affected: >= 3.8.1.0 and < 4.3.0.0

Fixed in: 4.3.0.0

Safe to downgrade to: a release before 3.8.1.0

1. Check installed version

apt-cache policy elastic-cloud-storage || rpm -q elastic-cloud-storage || elastic-cloud-storage --version

2. UPGRADE to 4.3.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade elastic-cloud-storage

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade elastic-cloud-storage

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 3.8.1.0 (Debian / Ubuntu)

apt-cache madison elastic-cloud-storage sudo apt install elastic-cloud-storage=<VERSION_BEFORE_3.8.1.0> sudo apt-mark hold elastic-cloud-storage

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

dnf --showduplicates list elastic-cloud-storage sudo dnf downgrade elastic-cloud-storage-<VERSION_BEFORE_3.8.1.0> sudo dnf versionlock add elastic-cloud-storage

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 objectscale UPGRADE

Affected: < 4.3.0.0

Fixed in: 4.3.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy objectscale || rpm -q objectscale || objectscale --version

2. UPGRADE to 4.3.0.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade objectscale

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-2026-40636?

elastic cloud storage: upgrade to 4.3.0.0; objectscale: upgrade to 4.3.0.0. Exact commands for each OS are on this page.

Is CVE-2026-40636 being exploited?

CVE-2026-40636 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-2026-40636 affect?

CVE-2026-40636 affects elastic cloud storage, objectscale. Severity is critical (CVSS 9.8). Dell ECS versions 3.8.1.0 through 3.8.1.7 and Dell ObjectScale versions prior to 4.3.0.0, contains a use of hard-coded credentials vulnerability. An unauthenticated attacker with local access could potentially exploit this vulnerability, le

How urgent is CVE-2026-40636?

Priority 43/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Dell vulnerabilities

Related CVEs

CVE-2026-35157 MEDIUM 5.8 UPGRADE UPGRADE Dell ECS versions 3.8.1.0 through 3.8.1.7 and Dell ObjectScale versions prior to 4.3.0.0, contains an improper
CVE-2026-26946 MEDIUM 6.7 UPGRADE UPGRADE Dell ECS versions 3.8.1.0 through 3.8.1.7 and Dell ObjectScale versions prior to 4.3.0.0, contains an improper

References

← Back to latest CVEs