🛡️ CVE-2025-20335
🟡 CVSS 5.3 — Medium ✅ No Known Exploit CWE-284 NVD
5.3
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 5.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE CWE-284
Public Exploit ✅ No
Source NVD
Published 2025-09-03
Updated 2026-06-02
Modified 2026-01-05
Fix URL N/A

Affected Packages

Software From version Fixed in
desk-phone-9841-firmware 3.0\(1\) 3.3\(1\)
desk-phone-9851-firmware 3.0\(1\) 3.3\(1\)
desk-phone-9861-firmware 3.0\(1\) 3.3\(1\)
desk-phone-9871-firmware 3.0\(1\) 3.3\(1\)
ip-phone-7811-firmware
ip-phone-7821-firmware
ip-phone-7841-firmware
ip-phone-7861-firmware
ip-phone-8811-firmware
ip-phone-8821-firmware
ip-phone-8841-firmware
ip-phone-8845-firmware
ip-phone-8851-firmware
ip-phone-8851nr-firmware
ip-phone-8861-firmware
ip-phone-8865-firmware
video-phone-8875-firmware

Similar Threats

Site Security Check

Concerned your site may already be targeted?

BotEraser analyzes incoming traffic patterns and helps identify bot behavior consistent with known exploit attempts.

Check My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.