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Fencer Vulns
high 7.5

CVE-2024-20378 json

A vulnerability in the web-based management interface of Cisco IP Phone firmware could allow an unauthenticated, remote attacker to retriev…

published 2024-05-01 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-18093

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

A vulnerability in the web-based management interface of Cisco IP Phone firmware could allow an unauthenticated, remote attacker to retrieve sensitive information from an affected device. This vulnerability is due to a lack of authentication for specific endpoints of the web-based management interface on an affected device. An attacker could exploit this vulnerability by connecting to the affected device. A successful exploit could allow the attacker to gain unauthorized access to the device, enabling the recording of user credentials and traffic to and from the affected device, including VoIP calls that could be replayed.

Patch / fix

  • cisco ip_phone_6821_with_multiplatform_firmware 12.0.4
  • cisco ip_phone_6841_with_multiplatform_firmware 12.0.4
  • cisco ip_phone_6851_with_multiplatform_firmware 12.0.4
  • cisco ip_phone_6861_with_multiplatform_firmware 12.0.4
  • cisco ip_phone_6871_with_multiplatform_firmware 12.0.4
  • cisco ip_phone_7811_with_multiplatform_firmware 12.0.4
  • cisco ip_phone_7821_with_multiplatform_firmware 12.0.4
  • cisco ip_phone_7841_with_multiplatform_firmware 12.0.4
  • cisco ip_phone_7861_with_multiplatform_firmware 12.0.4
  • cisco ip_phone_8811_with_multiplatform_firmware 12.0.4
  • cisco ip_phone_8841_with_multiplatform_firmware 12.0.4
  • cisco ip_phone_8851_with_multiplatform_firmware 12.0.4
  • cisco ip_phone_8851nr_with_multiplatform_firmware 12.0.4
  • cisco ip_phone_8861_with_multiplatform_firmware 12.0.4
  • cisco video_phone_8875_with_multiplatform_firmware 2.3.1.0101

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.81% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • Cisco Cisco IP Phones with Multiplatform Firmware
  • Cisco Cisco PhoneOS
  • cisco ip_phone_6871_with_multiplatform_firmware
  • cisco ip_phone_6821_with_multiplatform_firmware
  • cisco ip_phone_6851_with_multiplatform_firmware
  • cisco ip_phone_7821_with_multiplatform_firmware
  • cisco ip_phone_6861_with_multiplatform_firmware
  • cisco ip_phone_6825_with_multiplatform_firmware
  • cisco ip_phone_6841_with_multiplatform_firmware
  • cisco ip_phone_7811_with_multiplatform_firmware
  • cisco ip_phone_7841_with_multiplatform_firmware
  • cisco ip_phone_7861_with_multiplatform_firmware
  • cisco ip_phone_8800_series_with_multiplatform_firmware
  • cisco video_phone_8875_firmware

Classification

Weakness
  • CWE-305 Authentication Bypass by Primary Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.