Is CVE-2026-40636 in the CISA KEV catalog?

No. CVE-2026-40636 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-40636?

CVE-2026-40636 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2026-40636?

CVE-2026-40636 has an EPSS score of 0.22% (13th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-40636?

Upgrade elastic cloud storage to 4.3.0.0 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2026-40636

CRITICAL

9.8

CVSS v3

NVD

Description

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.

CWE-798Hard-coded Credentials

How to fix

Remediation Available

elastic cloud storageNVD

Affected:>= 3.8.1.0, < 4.3.0.0Fixed in:4.3.0.0CVE-2026-40636derived from NVD

objectscaleNVD

Affected:< 4.3.0.0Fixed in:4.3.0.0CVE-2026-40636derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.22%probability of exploitation in 30 days

13thpercentile

Low risk: more likely to be exploited than 13% of all known CVEs.

References

Vendor Advisory1

dell.com

Related Vulnerabilities

Other CWE-798 (Hard-coded Credentials) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-26138	Critical	9.8	98%	KEV	-
CVE-2024-3272	Critical	9.8	98%	KEV	-
CVE-2025-30406	Critical	9.0	94%	KEV	Fix
CVE-2024-28987	Critical	9.1	93%	KEV	Fix
CVE-2019-15976	Critical	9.8	93%	-	Fix
CVE-2024-20439	Critical	9.8	92%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-12.