TI-2021-13715 Aliases CVE-2021-34715 GHSA-p7w3-xcqr-pr4r

Cisco Expressway Series and TelePresence Video Communication Server Image Verification Vulnerability

LOW 34CWE-347Published 2021-08-18 · Updated 2024-11-07

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-347.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01056 64th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco TelePresence Video Communication Server (VCS) Expressway	all versions	—	No fix listed	CNA

Cisco TelePresence Video Communication Server (VCS) Expressway VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:expressway::::::::	up to x8.8.0	Vulnerable	Cisco
cpe:2.3:a:cisco:telepresence_video_communication_server::::::::	up to x8.8	Vulnerable	Cisco

cpe:2.3:a:cisco:expressway:*:*:*:*:*:*:*:* Versions up to x8.8.0 Vulnerable ·Cisco
cpe:2.3:a:cisco:telepresence_video_communication_server:*:*:*:*:*:*:*:* Versions up to x8.8 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-34715
2026-10-03 Alias added: GHSA-p7w3-xcqr-pr4r

References

Patch 1

20210818 Cisco Expressway Series and TelePresence Video Communication Server Image Verification Vulnerability

TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
TI-2018-03923 Uncontrolled resource consumption in Linux Kernel CVSS 3.1HIGH 7.5
TI-2022-05371 Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities CVSS 3.1CRITICAL 9.0
TI-2024-13189 Cross-site request forgery in Cisco TelePresence Video Communication Server Expressway CVSS 3.1CRITICAL 9.6
TI-2024-13187 Cross-site request forgery in Cisco TelePresence Video Communication Server Expressway CVSS 3.1CRITICAL 9.6
TI-2022-05372 Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities CVSS 3.1CRITICAL 9.0

See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences