Cisco Unity Connection up to 15SU4 Web-based Management Interface cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.32

Summaryinfo

A vulnerability described as problematic has been identified in Cisco Unity Connection up to 15SU4. Affected by this issue is some unknown functionality of the component Web-based Management Interface. Executing a manipulation can lead to cross site scripting. The identification of this vulnerability is CVE-2026-20059. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Cisco Unity Connection up to 15SU4 and classified as problematic. This vulnerability affects an unknown code block of the component Web-based Management Interface. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

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 exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

The advisory is available at sec.cloudapps.cisco.com. This vulnerability was named CVE-2026-20059 since 10/08/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/16/2026). This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-22951) and CERT Bund (WID-SEC-2026-1149). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Cisco Unity Connection

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.1
CNA Vector (cisco): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/08/2025 CVE reserved
04/15/2026 +189 days Advisory disclosed
04/15/2026 +0 days VulDB entry created
04/16/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-unity-vulns-n2EJSbbw
Status: Confirmed

CVE: CVE-2026-20059 (🔒)
GCVE (CVE): GCVE-0-2026-20059
GCVE (VulDB): GCVE-100-357754
EUVD: 🔒
CERT Bund: WID-SEC-2026-1149 - Cisco Unity Connection: Mehrere Schwachstellen

Entryinfo

Created: 04/15/2026 18:30
Updated: 04/16/2026 23:51
Changes: 04/15/2026 18:30 (65), 04/15/2026 20:03 (1), 04/16/2026 23:51 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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