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Vulnerability record · CVE-2021-34711 · published 6 October 2021

CVE-2021-34711: Cisco ip conference phone 7832 firmware path traversal vulnerability

Cisco · Ip Conference Phone 7832 Firmware

A vulnerability in the debug shell of Cisco IP Phone software could allow an authenticated, local attacker to read any file on the device file system. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by providing crafted input to a debug shell command. A successful exploit could allow the attacker to read any file on the device file system.

5.5 CVSS 3.1 Medium EPSS 0.27% · top 82.9% CWE-36 · CWE-36CWE-22 · Path traversal
5.5CVSS 3.1 base score, v2 2.1
0.27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
16Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A vulnerability in the debug shell of Cisco IP Phone software could allow an authenticated, local attacker to read any file on the device file system. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by providing crafted input to a debug shell command. A successful exploit could allow the attacker to read any file on the device file system.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

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

References

LinkTags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipphone-arbfileread-NPdtE2Ow Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipphone-arbfileread-NPdtE2Ow 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-2023-20078Cisco ip phone 6871 firmware stack-based buffer overflow vulnerabilityMultiple vulnerabilities in the web-based management interface of certain Cisco IP Phones could allow an unauthenticated, remote attacker to execute …EPSS 10%8.8CVE-2022-20968Cisco ip phone 7811 firmware out-of-bounds write vulnerabilityA vulnerability in the Cisco Discovery Protocol processing feature of Cisco IP Phone 7800 and 8800 Series firmware could allow an unauthenticated, ad…EPSS 6.1%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%8.1CVE-2022-20774Cisco ip phone 6871 firmware insufficient verification of data authenticity vulnerabilityA vulnerability in the web-based management interface of Cisco IP Phone 6800, 7800, and 8800 Series with Multiplatform Firmware could allow an unauth…EPSS 0.40%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%

Source: NIST National Vulnerability Database (record CVE-2021-34711), CISA KEV, FIRST EPSS (scores of 2026-10-11). This page is refreshed as NVD updates the record.