CVE-2026-20034
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk48th percentile - higher than 48% of all known CVEs
Summary
A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated, remote attacker to execute arbitrary code on an affected device. The issue is due to insufficient validation of user-supplied input.
Risk Assessment
Successful exploitation could allow the attacker to gain complete control of the device with root privileges, posing a critical risk to the confidentiality, integrity, and availability of the system.
Recommendation
Apply the security update provided by the vendor immediately and restrict access to the management interface to trusted users only.
Other vulnerabilities in Cisco Unity Connection
See all- CVE-2015-0616High
The Connection Conversation Manager (CuCsMgr) process in Cisco Unity Connection in versions 8.5 before 8.5(1)SU7, 8.6 before 8.6(2a)SU4, and 9.x before 9.1(2)SU2, when SIP trunk integration is enabled, allows remote attackers to cause a denial of service (core dump and restart) by improperly terminating SIP TCP connections.
- CVE-2015-0615High
The call-handling implementation in Cisco Unity Connection in versions before 8.5(1)SU7, 8.6 before 8.6(2a)SU4, 9.x before 9.1(2)SU2, and 10.0 before 10.0(1)SU1, when SIP trunk integration is enabled, allows remote attackers to cause a denial of service (port consumption) by improperly terminating SIP sessions.
- CVE-2015-0614High
The Connection Conversation Manager (CuCsMgr) process in Cisco Unity Connection before versions 8.5(1)SU7, 8.6(2a)SU4, 9.1(2)SU2, and 10.0(1)SU1, when SIP trunk integration is enabled, allows remote attackers to cause a denial of service via crafted SIP INVITE messages.
- CVE-2015-0613High
The Connection Conversation Manager (CuCsMgr) process in Cisco Unity Connection before version 8.5(1)SU7, 8.6 before 8.6(2a)SU4, 9.x before 9.1(2)SU2, and 10.0 before 10.0(1)SU1, when SIP trunk integration is enabled, allows remote attackers to cause a denial of service via crafted SIP INVITE messages.
- CVE-2015-0612High
The Connection Conversation Manager (CuCsMgr) process in Cisco Unity Connection versions 8.5 before 8.5(1)SU6, 8.6 before 8.6(2a)SU4, and 9.x before 9.1(2)SU2, when SIP trunk integration is enabled, allows remote attackers to cause a denial of service (SIP outage) via a crafted UDP packet.
- CVE-2014-3333High
The server in Cisco Unity Connection versions 9.1(1) and 9.1(2) allows remote authenticated users to obtain privileged access by conducting an 'HTTP Intercept' attack and leveraging the ability to read files within the context of the web-server user account.
- CVE-2026-20035High
A vulnerability in the web UI of Cisco Unity Connection Web Inbox allows an unauthenticated, remote attacker to conduct SSRF attacks. It is due to improper input validation for specific HTTP requests.
Original NVD description (English source)
A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by submitting a crafted API request. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of a targeted device. To exploit this vulnerability, the attacker must have valid user credentials on the affected device.