CVE-2020-3117
A vulnerability in the API Framework of Cisco AsyncOS for Cisco Web Security Appliance (WSA) and Cisco Content Security Management Appliance (SMA) could allow an unauthenticated, remote attacker to inject crafted HTTP headers in the web server's response. The vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by persuading a user to access a crafted URL and receive a malicious HTTP response. A successful exploit could allow the attacker to inject arbitrary HTTP headers into valid HTTP responses sent to a user's browser.
Key facts
- CVSS score
- 4.7 (v3.1)
- Severity
- MEDIUM
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N- Weakness (CWE)
- CWE-113
- EPSS score
- 0.9% (60th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2020-24388)
- Published
- September 23, 2020
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2020-24388 in the EU Vulnerability Database. Last updated in EUVD on November 13, 2024.
View on the EU Vulnerability DatabaseAffected products
- cisco / content security management appliance
- cisco / web security appliance
- cisco / web security appliance
Certified products that may be affected
1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.
- Cisco Web Security Appliance with AsyncOS 11.8 - Cisco Systems, Inc. - Common Criteria 567-LSS - active
References
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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