CVE-2024-20376

Published May 1, 2024 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Description

A vulnerability in the web-based management interface of Cisco IP Phone firmware could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a DoS condition.

This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface of an affected device. A successful exploit could allow the attacker to cause the affected device to reload.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco IP Phones with Multiplatform Firmware

affected

Version	Status	Constraints
`11.3.1 MSR2-6`	affected	—
`11.3.1 MSR3-3`	affected	—
`11.3.2`	affected	—
`11.3.3`	affected	—
`11.3.1 MSR4-1`	affected	—
`11.3.4`	affected	—
`11.3.5`	affected	—
`11.3.3 MSR2`	affected	—
`11.3.3 MSR1`	affected	—
`11.3.6`	affected	—
`11-3-1MPPSR4UPG`	affected	—
`11.3.7`	affected	—
`11-3-1MSR2UPG`	affected	—
`11.3.6SR1`	affected	—
`11.3.7SR1`	affected	—
`11.3.7SR2`	affected	—
`11.0.0`	affected	—
`11.0.1`	affected	—
`11.0.1 MSR1-1`	affected	—
`11.0.2`	affected	—
`11.1.1`	affected	—
`11.1.1 MSR1-1`	affected	—
`11.1.1 MSR2-1`	affected	—
`11.1.2`	affected	—
`11.1.2 MSR1-1`	affected	—
`11.1.2 MSR3-1`	affected	—
`11.2.1`	affected	—
`11.2.2`	affected	—
`11.2.3`	affected	—
`11.2.3 MSR1-1`	affected	—
`11.2.4`	affected	—
`11.3.1`	affected	—
`11.3.1 MSR1-3`	affected	—
`4.5`	affected	—
`4.6 MSR1`	affected	—
`4.7.1`	affected	—
`4.8.1`	affected	—
`4.8.1 SR1`	affected	—
`5.0.1`	affected	—
`12.0.1`	affected	—
`12.0.2`	affected	—
`12.0.3`	affected	—
`12.0.3SR1`	affected	—
`12.0.4`	affected	—
`5.1.1`	affected	—
`5.1.2`	affected	—
`5.1(2)SR1`	affected	—

Cisco

Cisco PhoneOS

affected

Version	Status	Constraints
`1.0.1`	affected	—
`2.1.1`	affected	—
`2.0.1`	affected	—
`2.3.1`	affected	—

Configuration 1 [-]

AND

cpe:2.3:o:cisco:video_phone_8875_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:video_phone_8875:-:*:*:*:*:*:*:*

Configuration 2 [-]

AND

cpe:2.3:o:cisco:ip_phone_6821_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_6821:-:*:*:*:*:*:*:*

Configuration 3 [-]

AND

cpe:2.3:o:cisco:ip_phone_6841_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_6841:-:*:*:*:*:*:*:*

Configuration 4 [-]

AND

cpe:2.3:o:cisco:ip_phone_6851_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_6851:-:*:*:*:*:*:*:*

Configuration 5 [-]

AND

cpe:2.3:o:cisco:ip_phone_6861_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_6861:-:*:*:*:*:*:*:*

Configuration 6 [-]

AND

cpe:2.3:o:cisco:ip_phone_6871_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_6871:-:*:*:*:*:*:*:*

Configuration 7 [-]

AND

cpe:2.3:o:cisco:ip_phone_7811_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_7811:-:*:*:*:*:*:*:*

Configuration 8 [-]

AND

cpe:2.3:o:cisco:ip_phone_7821_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_7821:-:*:*:*:*:*:*:*

Configuration 9 [-]

AND

cpe:2.3:o:cisco:ip_phone_7832_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_7832:-:*:*:*:*:*:*:*

Configuration 10 [-]

AND

cpe:2.3:o:cisco:ip_phone_7841_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_7841:-:*:*:*:*:*:*:*

Configuration 11 [-]

AND

cpe:2.3:o:cisco:ip_phone_7861_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_7861:-:*:*:*:*:*:*:*

Configuration 12 [-]

AND

cpe:2.3:o:cisco:ip_phone_8811_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_8811:-:*:*:*:*:*:*:*

Configuration 13 [-]

AND

cpe:2.3:o:cisco:ip_phone_8832_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_8832:-:*:*:*:*:*:*:*

Configuration 14 [-]

AND

cpe:2.3:o:cisco:ip_phone_8841_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_8841:-:*:*:*:*:*:*:*

Configuration 15 [-]

AND

cpe:2.3:o:cisco:ip_phone_8845_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_8845:-:*:*:*:*:*:*:*

Configuration 16 [-]

AND

cpe:2.3:o:cisco:ip_phone_8851_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_8851:-:*:*:*:*:*:*:*

Configuration 17 [-]

AND

cpe:2.3:o:cisco:ip_phone_8861_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_8861:-:*:*:*:*:*:*:*

Configuration 18 [-]

AND

cpe:2.3:o:cisco:ip_phone_8865_with_multiplatform_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ip_phone_8865:-:*:*:*:*:*:*:*

No data.

Vendor	Product	Versions
Cisco	Ip Phone Firmware	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2024-18091	A vulnerability in the web-based management interface of Cisco IP Phone firmware could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a DoS condition. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface of an affected device. A successful exploit could allow the attacker to cause the affected device to reload.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.881% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipphone-multi-vulns-cXAhCvS

History

Jan 5, 2026 3:00 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Cisco ip Phone 6821 Cisco ip Phone 6821 With Multiplatform Firmware Cisco ip Phone 6841 Cisco ip Phone 6841 With Multiplatform Firmware Cisco ip Phone 6851 Cisco ip Phone 6851 With Multiplatform Firmware Cisco ip Phone 6861 Cisco ip Phone 6861 With Multiplatform Firmware Cisco ip Phone 6871 Cisco ip Phone 6871 With Multiplatform Firmware Cisco ip Phone 7811 Cisco ip Phone 7811 With Multiplatform Firmware Cisco ip Phone 7821 Cisco ip Phone 7821 With Multiplatform Firmware Cisco ip Phone 7832 Cisco ip Phone 7832 With Multiplatform Firmware Cisco ip Phone 7841 Cisco ip Phone 7841 With Multiplatform Firmware Cisco ip Phone 7861 Cisco ip Phone 7861 With Multiplatform Firmware Cisco ip Phone 8811 Cisco ip Phone 8811 With Multiplatform Firmware Cisco ip Phone 8832 Cisco ip Phone 8832 With Multiplatform Firmware Cisco ip Phone 8841 Cisco ip Phone 8841 With Multiplatform Firmware Cisco ip Phone 8845 Cisco ip Phone 8845 With Multiplatform Firmware Cisco ip Phone 8851 Cisco ip Phone 8851 With Multiplatform Firmware Cisco ip Phone 8861 Cisco ip Phone 8861 With Multiplatform Firmware Cisco ip Phone 8865 Cisco ip Phone 8865 With Multiplatform Firmware Cisco video Phone 8875 Cisco video Phone 8875 Firmware
CPEs		cpe:2.3:h:cisco:ip_phone_6821:-:::::::* cpe:2.3:h:cisco:ip_phone_6841:-:::::::* cpe:2.3:h:cisco:ip_phone_6851:-:::::::* cpe:2.3:h:cisco:ip_phone_6861:-:::::::* cpe:2.3:h:cisco:ip_phone_6871:-:::::::* cpe:2.3:h:cisco:ip_phone_7811:-:::::::* cpe:2.3:h:cisco:ip_phone_7821:-:::::::* cpe:2.3:h:cisco:ip_phone_7832:-:::::::* cpe:2.3:h:cisco:ip_phone_7841:-:::::::* cpe:2.3:h:cisco:ip_phone_7861:-:::::::* cpe:2.3:h:cisco:ip_phone_8811:-:::::::* cpe:2.3:h:cisco:ip_phone_8832:-:::::::* cpe:2.3:h:cisco:ip_phone_8841:-:::::::* cpe:2.3:h:cisco:ip_phone_8845:-:::::::* cpe:2.3:h:cisco:ip_phone_8851:-:::::::* cpe:2.3:h:cisco:ip_phone_8861:-:::::::* cpe:2.3:h:cisco:ip_phone_8865:-:::::::* cpe:2.3:h:cisco:video_phone_8875:-:::::::* cpe:2.3:o:cisco:ip_phone_6821_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_6841_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_6851_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_6861_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_6871_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_7811_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_7821_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_7832_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_7841_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_7861_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_8811_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_8832_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_8841_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_8845_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_8851_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_8861_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:ip_phone_8865_with_multiplatform_firmware:::::::: cpe:2.3:o:cisco:video_phone_8875_firmware::::::::
Vendors & Products		Cisco ip Phone 6821 Cisco ip Phone 6821 With Multiplatform Firmware Cisco ip Phone 6841 Cisco ip Phone 6841 With Multiplatform Firmware Cisco ip Phone 6851 Cisco ip Phone 6851 With Multiplatform Firmware Cisco ip Phone 6861 Cisco ip Phone 6861 With Multiplatform Firmware Cisco ip Phone 6871 Cisco ip Phone 6871 With Multiplatform Firmware Cisco ip Phone 7811 Cisco ip Phone 7811 With Multiplatform Firmware Cisco ip Phone 7821 Cisco ip Phone 7821 With Multiplatform Firmware Cisco ip Phone 7832 Cisco ip Phone 7832 With Multiplatform Firmware Cisco ip Phone 7841 Cisco ip Phone 7841 With Multiplatform Firmware Cisco ip Phone 7861 Cisco ip Phone 7861 With Multiplatform Firmware Cisco ip Phone 8811 Cisco ip Phone 8811 With Multiplatform Firmware Cisco ip Phone 8832 Cisco ip Phone 8832 With Multiplatform Firmware Cisco ip Phone 8841 Cisco ip Phone 8841 With Multiplatform Firmware Cisco ip Phone 8845 Cisco ip Phone 8845 With Multiplatform Firmware Cisco ip Phone 8851 Cisco ip Phone 8851 With Multiplatform Firmware Cisco ip Phone 8861 Cisco ip Phone 8861 With Multiplatform Firmware Cisco ip Phone 8865 Cisco ip Phone 8865 With Multiplatform Firmware Cisco video Phone 8875 Cisco video Phone 8875 Firmware

Subscriptions

Cisco Ip Phone 6821 Ip Phone 6821 With Multiplatform Firmware Ip Phone 6841 Ip Phone 6841 With Multiplatform Firmware Ip Phone 6851 Ip Phone 6851 With Multiplatform Firmware Ip Phone 6861 Ip Phone 6861 With Multiplatform Firmware Ip Phone 6871 Ip Phone 6871 With Multiplatform Firmware Ip Phone 7811 Ip Phone 7811 With Multiplatform Firmware Ip Phone 7821 Ip Phone 7821 With Multiplatform Firmware Ip Phone 7832 Ip Phone 7832 With Multiplatform Firmware Ip Phone 7841 Ip Phone 7841 With Multiplatform Firmware Ip Phone 7861 Ip Phone 7861 With Multiplatform Firmware Ip Phone 8811 Ip Phone 8811 With Multiplatform Firmware Ip Phone 8832 Ip Phone 8832 With Multiplatform Firmware Ip Phone 8841 Ip Phone 8841 With Multiplatform Firmware Ip Phone 8845 Ip Phone 8845 With Multiplatform Firmware Ip Phone 8851 Ip Phone 8851 With Multiplatform Firmware Ip Phone 8861 Ip Phone 8861 With Multiplatform Firmware Ip Phone 8865 Ip Phone 8865 With Multiplatform Firmware Ip Phone Firmware Video Phone 8875 Video Phone 8875 Firmware

Weaknesses