CVE-2021-34715
4.7 · MEDIUMOverview
CVE-2021-34715 is a medium-severity vulnerability affecting cisco expressway. It was published on August 18, 2021 and has a CVSS 3.1 base score of 4.7 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
A vulnerability in the image verification function of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker to execute code with internal user privileges on the underlying operating system. The vulnerability is due to insufficient validation of the content of upgrade packages. An attacker could exploit this vulnerability by uploading a malicious archive to the Upgrade page of the administrative web interface. A successful exploit could allow the attacker to execute code with user-level privileges (the _nobody account) on the underlying operating system.
Remediation
Check the references section for vendor advisories and patches from cisco. Update expressway to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| cisco | expressway | 0 | Affected |
| cisco | telepresence_video_communication_server | 0 | Affected |
Frequently Asked Questions
What is CVE-2021-34715?
CVE-2021-34715 is a medium-severity vulnerability affecting cisco expressway. It was published on August 18, 2021 and has a CVSS 3.1 base score of 4.7 (MEDIUM).
How severe is CVE-2021-34715?
This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-34715?
Check the references section for vendor advisories and patches from cisco. Update expressway to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-34715?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-34715 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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