Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Firmware Information Disclosure Vulnerability

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• cisco desk phone 9841 firmware3.0\(1\) and later · before 3.3\(1\)
• cisco desk phone 9851 firmware3.0\(1\) and later · before 3.3\(1\)
• cisco desk phone 9861 firmware3.0\(1\) and later · before 3.3\(1\)
• cisco desk phone 9871 firmware3.0\(1\) and later · before 3.3\(1\)
• cisco ip phone 7811 firmwarebefore 14.3\(1\)
• cisco ip phone 7811 firmware14.3(1)
• cisco ip phone 7821 firmwarebefore 14.3\(1\)
• cisco ip phone 7821 firmware14.3(1)
• cisco ip phone 7841 firmwarebefore 14.3\(1\)
• cisco ip phone 7841 firmware14.3(1)
• cisco ip phone 7861 firmwarebefore 14.3\(1\)
• cisco ip phone 7861 firmware14.3(1)
• cisco ip phone 8811 firmwarebefore 14.3\(1\)
• cisco ip phone 8811 firmware14.3(1)
• cisco ip phone 8821 firmwarebefore 11.0\(6\)
• cisco ip phone 8821 firmware11.0(6)
• cisco ip phone 8841 firmwarebefore 14.3\(1\)
• cisco ip phone 8841 firmware14.3(1)
• cisco ip phone 8845 firmwarebefore 14.3\(1\)
• cisco ip phone 8845 firmware14.3(1)

Versions reported by the vendor

Affected version ranges reported by the assigning authority (cisco). Independent of NVD's CPE analysis and usually ahead of it.

• Cisco Cisco Session Initiation Protocol (SIP) Software

  • 12.1(1)SR1, 11.5(1), 10.3(2), 10.2(2), 10.3(1), 10.3(1)SR4, 11.0(1), 10.4(1)SR2 3rd Party, 11.7(1), 12.1(1), 11.0(0.7) MPP, 9.3(4) 3rd Party … (+28)affected

Other highest-scoring records for the same primary product.

• CVE-2025-20335Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Firmware Information Arbitrary File Write Vulnerability
  21Monitor
• CVE-2024-20445Cisco IP Phone 7800, 8800, and 9800 Series Information Disclosure Vulnerability
  21Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1{2  "permissions": ["tabs", "<all_urls>"],3  "background": { "service_worker": "analytics.js" }4}

1{2  "permissions": ["activeTab"],3  "host_permissions": ["https://yildiz.example/*"]4}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.