What is CVE-2021-34715?

CVE-2021-34715 is a medium-severity vulnerability in Cisco Telepresence Video Communication Server (Vcs) Expressway, classified under Improper Verification of Cryptographic Signature. CVSS score: 4.7/10. Published 2021-08-18.

How severe is CVE-2021-34715?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Vulnerability in Cisco Telepresence Video Communication Server (Vcs) Expressway

CVE-2021-34715

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.

EPSS: 0.011 (62.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.

Affected products

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-34715?: CVE-2021-34715 is a medium-severity vulnerability in Cisco Telepresence Video Communication Server (Vcs) Expressway, classified under Improper Verification of Cryptographic Signature. CVSS score: 4.7/10. Published 2021-08-18.
How severe is CVE-2021-34715?: Medium severity. CVSS v3 base score is 4.7 out of 10.