PT-2025-42380 · Cisco · Cisco Ip Phone 7800 Series+4

Published 2025-10-15 · Updated 2025-10-15 · CVE-2025-20351

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Cisco Desk Phone 9800 Series Cisco IP Phone 7800 and 8800 Series Cisco Video Phone 8875

Description A flaw exists in the web UI of the affected devices running Cisco SIP Software that may allow a remote attacker to perform cross-site scripting (XSS) attacks against a user of the web UI. The issue is due to insufficient validation of user-supplied input by the web UI. An attacker could exploit this by convincing a user to click a crafted link, potentially allowing the execution of arbitrary script code or access to sensitive browser-based information. To exploit this, the phone must be registered to Cisco Unified Communications Manager and have Web Access enabled.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-20351

Affected Products

Cisco Desk Phone 9800 Series

Cisco Ip Phone 7800 Series

Cisco Ip Phone 8800 Series

Cisco Unified Communications Manager

Cisco Video Phone 8875

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2025-20351 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-phone-dos-FPyjLV7A · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-20351 · Vendor Advisory
• https://t.me/CVEtracker/35024 · Telegram Post
• https://twitter.com/CVEnew/status/1978545036850774325 · Twitter Post