01 Record

CVE-2024-20376

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.

HighPUBLISHEDCNA: cisco

CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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02 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.

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.87% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 56.3% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2024-05-01 16:43Z2 YR AGO

Last updated

2024-08-01 21:59Z2 YR AGO

Reserved

2023-11-08

Assigning CNA

cisco

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

f6d4b4eba9da71e1ea452b7ee0435e793bdb743c3341357a3d30dc6d4bc74f2d

05 Affected products

VendorProductVersionsPlatforms

CiscoCisco IP Phones with Multiplatform Firmware11.3.1 MSR2-6, 11.3.1 MSR3-3, 11.3.2, 11.3.3, 11.3.1 MSR4-1, 11.3.4, 11.3.5, 11.3.3 MSR2, 11.3.3 MSR1, 11.3.6, 11-3-1MPPSR4UPG, 11.3.7, 11-3-1MSR2UPG, 11.3.6SR1, 11.3.7SR1, 11.3.7SR2, 11.0.0, 11.0.1, 11.0.1 MSR1-1, 11.0.2, 11.1.1, 11.1.1 MSR1-1, 11.1.1 MSR2-1, 11.1.2, 11.1.2 MSR1-1, 11.1.2 MSR3-1, 11.2.1, 11.2.2, 11.2.3, 11.2.3 MSR1-1, 11.2.4, 11.3.1, 11.3.1 MSR1-3, 4.5, 4.6 MSR1, 4.7.1, 4.8.1, 4.8.1 SR1, 5.0.1, 12.0.1, 12.0.2, 12.0.3, 12.0.3SR1, 12.0.4, 5.1.1, 5.1.2, 5.1(2)SR1—

CiscoCisco PhoneOS1.0.1, 2.1.1, 2.0.1, 2.3.1—

ciscoip_phone_6871_with_multiplatform_firmware0 to 12.0.4—

ciscoip_phone_6821_with_multiplatform_firmware0 to 12.0.4—

ciscoip_phone_6851_with_multiplatform_firmware0 to 12.0.4—

ciscoip_phone_7821_with_multiplatform_firmware0 to 12.0.4—

ciscoip_phone_6861_with_multiplatform_firmware0 to 12.0.4—

ciscoip_phone_6825_with_multiplatform_firmware0 to 12.0.4—

ciscoip_phone_6841_with_multiplatform_firmware0 to 12.0.4—

ciscoip_phone_7811_with_multiplatform_firmware0 to 12.0.4—

ciscoip_phone_7841_with_multiplatform_firmware0 to 12.0.4—

ciscoip_phone_7861_with_multiplatform_firmware0 to 12.0.4—

ciscoip_phone_8800_series_with_multiplatform_firmware0 to 12.0.4—