CVE-2021-1359
A vulnerability in the configuration management of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to perform command injection and elevate privileges to root. This vulnerability is due to insufficient validation of user-supplied XML input for the web interface. An attacker could exploit this vulnerability by uploading crafted XML configuration files that contain scripting code to a vulnerable device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system and elevate privileges to root. An attacker would need a valid user account with the rights to upload configuration files to exploit this vulnerability.
Key facts
- CVSS score
- 6.3 (v3.1)
- Severity
- MEDIUM
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L- Weakness (CWE)
- CWE-112
- EPSS score
- 1.9% (79th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2021-6826)
- Published
- July 8, 2021
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2021-6826 in the EU Vulnerability Database. Last updated in EUVD on November 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- cisco / asyncos
- 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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