Cisco
Cisco Unity Connection: vulnerabilities and CVEs
Cisco Unity Connection has 66 published vulnerabilities, 8 of them in the last 12 months. 5 are rated critical and 2 are listed by CISA as actively exploited.
CVEs66
Last 12 months8
Critical5
Actively exploited2
All vulnerabilities in the catalogue →⭐ Follow this technology
🔴 Actively exploited (CISA KEV)
| CVE | Severity | EPSS | Active exploitation | Published | Description |
|---|---|---|---|---|---|
| CVE-2026-20045 | Critical (9.8) | 4.5% | ⚠ Active exploitation | Jan 21, 2026 | — |
| CVE-2021-44228 | Critical (10) | 100% | ⚠ Active exploitation | Dec 10, 2021 | Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other… |
Latest vulnerabilities
| CVE | Severity | EPSS | Active exploitation | Published | Description |
|---|---|---|---|---|---|
| CVE-2026-20035 | High (7.2) | 0.30% | — | May 6, 2026 | A vulnerability in the web UI of Cisco Unity Connection Web Inbox could allow an unauthenticated, remote attacker to conduct SSRF attacks through an affected device. This vulnerability is due to improper input… |
| CVE-2026-20034 | High (8.8) | 0.71% | — | May 6, 2026 | 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… |
| CVE-2026-20081 | Medium (6.5) | 0.39% | — | Apr 15, 2026 | These vulnerabilities are due to improper sanitization of user input to the web-based management interface. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request. A successful exploit could… |
| CVE-2026-20078 | Medium (6.5) | 0.39% | — | Apr 15, 2026 | These vulnerabilities are due to improper sanitization of user input to the web-based management interface. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request. A successful exploit could… |
| CVE-2026-20061 | Medium (6.5) | 0.23% | — | Apr 15, 2026 | A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated, remote attacker to perform an SQL injection attack against an affected device. To exploit this vulnerability,… |
| CVE-2026-20060 | Medium (4.7) | 0.20% | — | Apr 15, 2026 | A vulnerability in the web-based management interface of Cisco Unity Connection could allow an unauthenticated, remote attacker to redirect a user to a malicious web page. This vulnerability is due to improper input… |
| CVE-2026-20059 | Medium (6.1) | 0.19% | — | Apr 15, 2026 | A vulnerability in the web-based management interface of Cisco Unity Connection could allow an unauthenticated, remote attacker to conduct a reflected XSS attack against a user of the interface. This vulnerability… |
| CVE-2026-20045 | Critical (9.8) | 4.5% | ⚠ Active exploitation | Jan 21, 2026 | — |
| CVE-2025-20278 | Medium (6.7) | 0.18% | — | Jun 4, 2025 | A vulnerability in the CLI of multiple Cisco Unified Communications products could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system of an affected device as the… |
| CVE-2020-3532 | Medium (6.1) | 0.50% | — | Nov 18, 2024 | A vulnerability in the web-based management interface of Cisco Unified Communications Manager, Cisco Unified Communications Manager Session Management Edition, Cisco Unified Communications Manager IM… |
| CVE-2024-20305 | Medium (4.8) | 0.35% | — | Jan 26, 2024 | A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. This… |
| CVE-2024-20253 | Critical (10) | 2.4% | — | Jan 26, 2024 | A vulnerability in multiple Cisco Unified Communications and Contact Center Solutions products could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due… |
| CVE-2024-20272 | Critical (9.8) | 1.6% | — | Jan 17, 2024 | A vulnerability in the web-based management interface of Cisco Unity Connection could allow an unauthenticated, remote attacker to upload arbitrary files to an affected system and execute commands on the underlying… |
| CVE-2023-20259 | High (7.5) | 0.61% | — | Oct 4, 2023 | A vulnerability in an API endpoint of multiple Cisco Unified Communications Products could allow an unauthenticated, remote attacker to cause high CPU utilization, which could impact access to the web-based management… |
| CVE-2023-20266 | High (7.2) | 0.49% | — | Aug 30, 2023 | A vulnerability in Cisco Emergency Responder, Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection could allow… |
| CVE-2022-20859 | High (8.8) | 1.3% | — | Jul 6, 2022 | A vulnerability in the Disaster Recovery framework of Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), and Cisco Unity Connection… |
| CVE-2022-20800 | Medium (6.1) | 0.76% | — | Jul 6, 2022 | A vulnerability in the web-based management interface of Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), Cisco Unified Communications… |
| CVE-2022-20752 | Medium (5.3) | 1.0% | — | Jul 6, 2022 | A vulnerability in Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection could allow an unauthenticated, remote… |
| CVE-2022-20788 | Medium (6.1) | 0.83% | — | Apr 21, 2022 | A vulnerability in the web-based management interface of Cisco Unified Communications Manager (Unified CM), Cisco Unified CM Session Management Edition (Unified CM SME), and Cisco Unity Connection could allow an… |
| CVE-2021-44228 | Critical (10) | 100% | ⚠ Active exploitation | Dec 10, 2021 | Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other… |
| CVE-2021-34701 | Medium (4.3) | 1.6% | — | Nov 4, 2021 | A vulnerability in the web-based management interface of Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), Cisco Unified Communications… |
| CVE-2021-1409 | Medium (6.1) | 0.82% | — | Apr 8, 2021 | Multiple vulnerabilities in the web-based management interface of Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unified… |
| CVE-2021-1380 | Medium (6.1) | 0.82% | — | Apr 8, 2021 | Multiple vulnerabilities in the web-based management interface of Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unified… |
| CVE-2021-1362 | High (8.8) | 2.7% | — | Apr 8, 2021 | A vulnerability in the SOAP API endpoint of Cisco Unified Communications Manager, Cisco Unified Communications Manager Session Management Edition, Cisco Unified Communications Manager IM & Presence Service, Cisco… |
| CVE-2021-1226 | Medium (6.5) | 0.91% | — | Jan 13, 2021 | A vulnerability in the audit logging component of Cisco Unified Communications Manager, Cisco Unified Communications Manager Session Management Edition, Cisco Unified Communications Manager IM & Presence Service,… |
| CVE-2020-3130 | Medium (6.5) | 1.8% | — | Sep 23, 2020 | A vulnerability in the web management interface of Cisco Unity Connection could allow an authenticated remote attacker to overwrite files on the underlying filesystem. The vulnerability is due to insufficient input… |
| CVE-2020-3282 | Medium (6.1) | 0.80% | — | Jul 2, 2020 | A vulnerability in the web-based management interface of Cisco Unified Communications Manager, Cisco Unified Communications Manager Session Management Edition, Cisco Unified Communications Manager IM & Presence… |
| CVE-2020-3129 | Medium (4.8) | 0.62% | — | Jan 26, 2020 | A vulnerability in the web-based management interface of Cisco Unity Connection Software could allow an authenticated, remote attacker to perform a stored cross-site scripting (XSS) attack. The vulnerability is due to… |
| CVE-2019-1915 | Medium (6.5) | 0.67% | — | Oct 2, 2019 | A vulnerability in the web-based interface of Cisco Unified Communications Manager, Cisco Unified Communications Manager Session Management Edition (SME), Cisco Unified Communications Manager IM and Presence (Unified CM… |
| CVE-2019-12707 | Medium (6.1) | 1.1% | — | Oct 2, 2019 | A vulnerability in the web-based interface of multiple Cisco Unified Communications products could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based… |
🎯 How it gets exploited (ATT&CK techniques)
Number of CVEs of this technology mapped to each exploitation or primary-impact technique.