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Vulnerability record · CVE-2019-1765 · published 22 March 2019

CVE-2019-1765: Cisco ip phone 8821 firmware path traversal vulnerability

Cisco · Ip Phone 8821 Firmware

A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 8800 Series could allow an authenticated, remote attacker to write arbitrary files to the filesystem. The vulnerability is due to insufficient input validation and file-level permissions. An attacker could exploit this vulnerability by uploading invalid files to an affected device. A successful exploit could allow the attacker to write files in arbitrary locations on the filesystem. This vulnerability affects Cisco IP Phone 8800 Series products running a SIP Software release prior to 11.0(5) for Wireless IP Phone 8821 and 8821-EX; and 12.5(1)SR1 for the IP Conference Phone 8832 and the rest of the IP Phone 8800 Series.

6.5 CVSS 3.0 Medium EPSS 1.4% · top 29.3% CWE-22 · Path traversal
6.5CVSS 3.0 base score, v2 4.0
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 8800 Series could allow an authenticated, remote attacker to write arbitrary files to the filesystem. The vulnerability is due to insufficient input validation and file-level permissions. An attacker could exploit this vulnerability by uploading invalid files to an affected device. A successful exploit could allow the attacker to write files in arbitrary locations on the filesystem. This vulnerability affects Cisco IP Phone 8800 Series products running a SIP Software release prior to 11.0(5) for Wireless IP Phone 8821 and 8821-EX; and 12.5(1)SR1 for the IP Conference Phone 8832 and the rest of the IP Phone 8800 Series.

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190320-ipptv Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190320-ipptv Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-3161Cisco IP Phones web server input validation flaw allows root RCE and DoSThe web server on multiple Cisco IP Phone models fails to properly validate HTTP requests, allowing a crafted request to trigger remote code executio…KEVEPSS 84%analysed9.8CVE-2019-1716Cisco ip phone 8821 firmware improper input validation vulnerabilityA vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 7800 Series and Cisco IP Phone…EPSS 3.1%8.8CVE-2020-3111Cisco ip conference phone 7832 firmware improper input validation vulnerabilityA vulnerability in the Cisco Discovery Protocol implementation for the Cisco IP Phone could allow an unauthenticated, adjacent attacker to remotely e…EPSS 3.1%8.8CVE-2019-1764Cisco ip phone 8821 firmware cross-site request forgery vulnerabilityA vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 8800 Series could allow an una…EPSS 0.70%7.5CVE-2025-20350Cisco desk phone 9871 firmware stack-based buffer overflow vulnerabilityA vulnerability in the web UI of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 running Cisco SIP Soft…EPSS 0.48%7.5CVE-2025-20336Cisco desk phone 9841 firmware information exposure vulnerabilityA vulnerability in the directory permissions of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 could a…EPSS 0.39%7.5CVE-2019-1922Cisco ip conference phone 7832 firmware null pointer dereference vulnerabilityA vulnerability in Cisco SIP IP Phone Software for Cisco IP Phone 7800 Series and 8800 Series could allow an unauthenticated, remote attacker to caus…EPSS 1.3%7.5CVE-2019-1635Cisco ip conference phone 7832 firmware vulnerabilityA vulnerability in the call-handling functionality of Session Initiation Protocol (SIP) Software for Cisco IP Phone 7800 Series and 8800 Series could…EPSS 2.0%

Source: NIST National Vulnerability Database (record CVE-2019-1765), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.