CVE-2026-20156
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk17th percentile - higher than 17% of all known CVEs
Summary
As part of an internal security review of Cisco RoomOS, a vulnerability related to improper restriction of operations within a memory buffer (CWE-119) was identified. This flaw could allow an attacker to perform unauthorized memory operations.
Risk Assessment
The risk to the organization includes potential compromise of RoomOS devices, data leakage, or service disruption, impacting the confidentiality and availability of communication systems.
Recommendation
It is recommended to immediately update RoomOS software to the latest version released by Cisco, which includes security fixes. Monitor Cisco security advisories for detailed information.
Other vulnerabilities in Cisco RoomOS
See all- CVE-2026-20302Medium
A vulnerability in the USB driver of Cisco RoomOS allows an unauthenticated attacker with physical access to the USB port to execute arbitrary code with root privileges. The issue is due to insufficient boundary checks, leading to a buffer overflow.
- CVE-2026-20289Medium
A vulnerability in the logging subsystem of Cisco RoomOS could allow an authenticated, local attacker with low privileges to access sensitive information. This is due to logging of sensitive data, and exploitation involves enabling a specific logging level and collecting system logs. Successful exploitation could reveal user login credentials.
- CVE-2026-20187High
CVE-2026-20187 involves improper handling of exceptional conditions in Cisco RoomOS software. It was discovered during an internal security review and addressed in a hardening release.
- CVE-2026-20158High
As part of an internal security review of Cisco RoomOS, multiple vulnerabilities related to improper control of a resource through its lifetime were identified. These flaws are classified under CWE-664 and have been addressed in a software hardening release.
- CVE-2026-20157High
The vulnerability in Cisco RoomOS is due to missing encryption, which could lead to exposure of sensitive data. The issue was discovered during an internal security review and addressed in a software hardening release.
- CVE-2026-20153High
As part of an internal security review of Cisco RoomOS, multiple vulnerabilities related to improper input validation (CWE-20) were identified. These flaws could allow an attacker to manipulate input data, potentially leading to unauthorized actions.
- CVE-2026-20150High
As part of an internal security review of Cisco RoomOS, multiple vulnerabilities related to improper access control (CWE-284) were identified. These vulnerabilities have been addressed in a software hardening release.
Original NVD description (English source)
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco RoomOS engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20156 are related to improper restriction of operations within the bounds of a memory buffer that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-119.