Is CVE-2021-20613 in the CISA KEV catalog?

No. CVE-2021-20613 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-20613?

CVE-2021-20613 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-20613?

CVE-2021-20613 has an EPSS score of 3.60% (88th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2021-20613?

No published fix for CVE-2021-20613 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2021-20613

HIGHEPSS 88th pctl

7.5

CVSS v3

NVD

Description

Improper initialization vulnerability in MELSEC-F series FX3U-ENET Firmware version 1.16 and prior, FX3U-ENET-L Firmware version 1.16 and prior and FX3U-ENET-P502 Firmware version 1.16 and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition in communication function of the product by sending specially crafted packets. Control by MELSEC-F series PLC is not affected by this vulnerability, but system reset is required for recovery.

CWE-665

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

3.60%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Vendor Advisory1

mitsubishielectric.com

Third-Party Advisory2

Related Vulnerabilities

Other CWE-665 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-0847	High	7.8	89%	KEV	Fix
CVE-2022-22719	High	7.5	70%	-	Fix
CVE-2020-28019	High	7.5	62%	-	Fix
CVE-2022-46164	Critical	9.4	49%	-	Fix
CVE-2022-37128	Critical	9.8	21%	-	-
CVE-2019-14271	Critical	9.8	19%	-	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.