A vulnerability in the directory permissions of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 could allow an unauthenticated, remote attacker to write arbitrary files on an affected device.

This vulnerability is due to a lack of proper authentication controls. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to perform arbitrary file writes to specific directories in the underlying operating system.
Note: To exploit this vulnerability, Web Access must be enabled on the phone. Web Access is disabled by default.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00034.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Cisco
  • Ip Phone 7800
  • Ip Phone 8800
  • Ip Phone 9800
  • Session Initiation Protocol \(sip\) Firmware
  • Video Phone 8875

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Cisco
  • Ip Phone 7800
  • Ip Phone 8800
  • Ip Phone 9800
  • Session Initiation Protocol \(sip\) Firmware
  • Video Phone 8875
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-phone-write-g3kcC5Df cve-icon cve-icon
History

Thu, 04 Sep 2025 13:15:00 +0000

Type Values Removed Values Added
First Time appeared Cisco
Cisco ip Phone 7800
Cisco ip Phone 8800
Cisco ip Phone 9800
Cisco session Initiation Protocol \(sip\) Firmware
Cisco video Phone 8875
Vendors & Products Cisco
Cisco ip Phone 7800
Cisco ip Phone 8800
Cisco ip Phone 9800
Cisco session Initiation Protocol \(sip\) Firmware
Cisco video Phone 8875

Wed, 03 Sep 2025 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 03 Sep 2025 17:45:00 +0000

Type Values Removed Values Added
Description A vulnerability in the directory permissions of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 could allow an unauthenticated, remote attacker to write arbitrary files on an affected device. This vulnerability is due to a lack of proper authentication controls. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to perform arbitrary file writes to specific directories in the underlying operating system. Note: To exploit this vulnerability, Web Access must be enabled on the phone. Web Access is disabled by default.
Title Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Firmware Information Arbitrary File Write Vulnerability
Weaknesses CWE-284
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2025-09-03T17:56:55.586Z

Reserved: 2024-10-10T19:15:13.255Z

Link: CVE-2025-20335

cve-icon Vulnrichment

Updated: 2025-09-03T17:56:32.603Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-09-03T18:15:34.393

Modified: 2025-09-04T15:35:29.497

Link: CVE-2025-20335

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-09-04T13:12:25Z