Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities

published 2022-07-06 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-26063

cvss: 9.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits: 0; none known

Multiple vulnerabilities in the API and in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow a remote attacker to overwrite arbitrary files or conduct null byte poisoning attacks on an affected device. Note: Cisco Expressway Series refers to the Expressway Control (Expressway-C) device and the Expressway Edge (Expressway-E) device. For more information about these vulnerabilities, see the Details section of this advisory.

Patch / fix

fixed in 2

cisco expressway x14.0.7
cisco telepresence_video_communication_server x14.0.7

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-11-06)

Exploit prediction

1.14% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.0	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L
NVD	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

Cisco Cisco TelePresence Video Communication Server (VCS) Expressway

Classification

Weakness

CWE-158 Improper Neutralization of Null Byte or NUL Character
CWE-295 Improper Certificate Validation

References

tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-overwrite-3buqW8LH
vendor-advisory

Sources

CVE List CVE-2022-20813
NVD CVE-2022-20813

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary