CVE-2021-23270
HIGHDescription
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.
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
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploit Intelligence
Moderate risk: more likely to be exploited than 61% of all known CVEs.
References
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 | 3.2% | - | Fix |
Common questions
How do I fix 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.
Is CVE-2021-23270 being actively exploited?
Not that we know of. CVE-2021-23270 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.0% is the estimated probability that it will be exploited in the next 30 days. That is higher than 61% of all scored CVEs.
How severe is CVE-2021-23270?
CVE-2021-23270 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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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.