CVE-2021-34711

Name: CVE-2021-34711
Creator: NVD / NIST
Published: 2021-10-06T20:15:09.587+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.26%

Last modified Jun 17, 2026

CVE-2021-34711 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.26%

17.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Ip Conference Phone 7832 Firmware	< 14.1\(1\)
Cisco	Ip Conference Phone 8832 Firmware	< 14.1\(1\)
Cisco	Ip Phone 7811 Firmware	< 14.1\(1\)
Cisco	Ip Phone 7821 Firmware	< 14.1\(1\)
Cisco	Ip Phone 7832 Firmware	< 14.1\(1\)
Cisco	Ip Phone 7841 Firmware	< 14.1\(1\)
Cisco	Ip Phone 7861 Firmware	< 14.1\(1\)
Cisco	Ip Phone 8811 Firmware	< 14.1\(1\)
Cisco	Ip Phone 8831 Firmware	< 14.1\(1\)
Cisco	Ip Phones 8832 Firmware	< 14.1\(1\)
Cisco	Ip Phone 8841 Firmware	< 14.1\(1\)
Cisco	Ip Phone 8845 Firmware	< 14.1\(1\)
Cisco	Ip Phone 8851 Firmware	< 14.1\(1\)
Cisco	Ip Phone 8861 Firmware	< 14.1\(1\)
Cisco	Ip Phone 8865 Firmware	< 14.1\(1\)
Cisco	Wireless Ip Phone 8821 Firmware	< 11.0\(6\)sr2

References

Timeline

Published: Oct 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34711?

How severe is CVE-2021-34711?

CVE-2021-34711 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34711?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-34711?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST