Is CVE-2021-40334 in the CISA KEV catalog?

No. CVE-2021-40334 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-40334?

CVE-2021-40334 has a CVSS v3 base score of 8.6 (HIGH).

What is the EPSS score for CVE-2021-40334?

CVE-2021-40334 has an EPSS score of 0.96% (57th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-40334?

Upgrade fox615 firmware to r15a or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-40334

HIGH

8.6

CVSS v3

NVD

Description

Missing Handler vulnerability in the proprietary management protocol (port TCP 5558) of Hitachi Energy FOX61x, XCM20 allows an attacker that exploits the vulnerability by activating SSH on port TCP 5558 to cause disruption to the NMS and NE communication. This issue affects: Hitachi Energy FOX61x versions prior to R15A. Hitachi Energy XCM20 versions prior to R15A.

CWE-431

How to fix

Remediation Available

fox615 firmwareNVD

Affected:< r15aFixed in:r15aCVE-2021-40334derived from NVD

xcm20 firmwareNVD

Affected:< r15aFixed in:r15aCVE-2021-40334derived 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

ScopeChanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.96%probability of exploitation in 30 days

57thpercentile

Moderate risk: more likely to be exploited than 57% of all known CVEs.

References

Vendor Advisory2

Related Vulnerabilities

Other CWE-431 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-4775	Medium	5.9	0.2%	-	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 2024-11-21.