CVE-2024-20378

CVE-2024-20378 is a high-severity vulnerability in Cisco Ip Phone 6821 With Multiplatform Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-305.

Key facts

Description

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.

Frequently asked questions

What is CVE-2024-20378?
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.
How severe is CVE-2024-20378?
CVE-2024-20378 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2024-20378 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-20378?
CVE-2024-20378 primarily affects Cisco Ip Phone 6821 With Multiplatform Firmware. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-20378?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-20378 have an EU (EUVD) identifier?
Yes. CVE-2024-20378 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18093.
When was CVE-2024-20378 published?
CVE-2024-20378 was published on 2024-05-01 and last updated on 2026-06-17.

References

Affected products (29)

More vulnerabilities in Cisco Ip Phone 6821 With Multiplatform Firmware

All CVEs affecting Cisco Ip Phone 6821 With Multiplatform Firmware →

Other CWE-305 vulnerabilities

Browse all CWE-305 vulnerabilities →