Is CVE-2021-23270 in the CISA KEV catalog?

No. CVE-2021-23270 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-23270?

CVE-2021-23270 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-23270?

CVE-2021-23270 has an EPSS score of 1.03% (60th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2021-23270?

No published fix for CVE-2021-23270 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2021-23270

HIGH

7.5

CVSS v3

NVD

Description

In Gargoyle OS 1.12.0, when IPv6 is used, a routing loop can occur that generates excessive network traffic between an affected device and its upstream ISP's router. This occurs when a link prefix route points to a point-to-point link, a destination IPv6 address belongs to the prefix and is not a local IPv6 address, and a router advertisement is received with at least one global unique IPv6 prefix for which the on-link flag is set.

CWE-834

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

1.03%probability of exploitation in 30 days

60thpercentile

Moderate risk: more likely to be exploited than 60% of all known CVEs.

References

Patch1

github.com

Related Vulnerabilities

Other CWE-834 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-35515	High	7.5	12%	-	Fix
CVE-2021-39924	High	7.5	4.9%	-	Fix
CVE-2023-1993	Medium	6.3	4.1%	-	Fix
CVE-2018-14342	High	7.5	3.7%	-	Fix
CVE-2020-14303	High	7.5	3.5%	-	Fix
CVE-2018-9133	Medium	6.5	3.3%	-	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.