CVE-2021-1615
HIGHDescription
A vulnerability in the packet processing functionality of Cisco Embedded Wireless Controller (EWC) Software for Catalyst Access Points (APs) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected AP. This vulnerability is due to insufficient buffer allocation. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to exhaust available resources and cause a DoS condition on an affected AP, as well as a DoS condition for client traffic traversing the AP.
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:C/C:N/I:N/A:H
Exploit Intelligence
Moderate risk: more likely to be exploited than 69% of all known CVEs.
References
Related Vulnerabilities
Other CWE-410 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2022-40224 | High | 7.5 | 65% | - | - |
| CVE-2025-0453 | High | 7.5 | 11% | - | - |
| CVE-2022-2048 | High | 7.5 | 2.3% | - | Fix |
| CVE-2025-27479 | High | 7.5 | 2.0% | - | Fix |
| CVE-2018-13815 | High | 7.5 | 1.8% | - | Fix |
| CVE-2019-13921 | High | 7.5 | 1.4% | - | - |
Common questions
How do I fix CVE-2021-1615?
No published fix for CVE-2021-1615 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2021-1615 being actively exploited?
Not that we know of. CVE-2021-1615 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 69% of all scored CVEs.
How severe is CVE-2021-1615?
CVE-2021-1615 has a CVSS v3 base score of 8.6, 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.