CVE-2023-20215
MEDIUMDescription
A vulnerability in the scanning engines of Cisco AsyncOS Software for Cisco Secure Web Appliance could allow an unauthenticated, remote attacker to bypass a configured rule, allowing traffic onto a network that should have been blocked. This vulnerability is due to improper detection of malicious traffic when the traffic is encoded with a specific content format. An attacker could exploit this vulnerability by using an affected device to connect to a malicious server and receiving crafted HTTP responses. A successful exploit could allow the attacker to bypass an explicit block rule and receive traffic that should have been rejected by the device.
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:L/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 46% of all known CVEs.
References
Related Vulnerabilities
Other CWE-202 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2025-25205 | High | 8.2 | 4.2% | - | Fix |
| CVE-2025-69200 | High | 7.5 | 2.0% | - | Fix |
| CVE-2021-32743 | High | 8.8 | 1.8% | - | Fix |
| CVE-2019-19000 | Medium | 6.5 | 1.1% | - | - |
| CVE-2022-20747 | Medium | 6.5 | 0.9% | - | Fix |
| CVE-2023-0785 | Low | 3.7 | 0.9% | - | - |
Common questions
How do I fix CVE-2023-20215?
No published fix for CVE-2023-20215 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2023-20215 being actively exploited?
Not that we know of. CVE-2023-20215 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.62% is the estimated probability that it will be exploited in the next 30 days. That is higher than 46% of all scored CVEs.
How severe is CVE-2023-20215?
CVE-2023-20215 has a CVSS v3 base score of 5.8, rated medium. 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.