Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessObtain low-privilege authenticated access
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DeliveryReach RoomOS management interface over network
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ExploitAbuse improper access control check
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ExecutionEscalate to administrative privileges
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ImpactCompromise device confidentiality, integrity, and availability
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK
1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Exploitation requires the attacker to already hold a low-privilege authenticated foothold on the Cisco RoomOS device or its management interface (CVSS PR:L), reachable over the network (AV:N) with no user interaction and low complexity. The specific vulnerable feature is not disaggregated in the available data - the CVE groups multiple internally-found improper-access-control defects - so the exact API endpoint, role boundary, or configuration setting abused is not stated and should be confirmed from the Cisco advisory. Limiting factors that reduce real-world risk: an attacker cannot exploit this purely pre-authentication (some valid low-tier access is needed), the target must be a RoomOS endpoint running a pre-hardening release, and device management reachability can be constrained by network segmentation. The 'Authentication Bypass' tag suggests the flaw lets an existing low-privilege actor cross a role/authorization boundary rather than authenticate from nothing. |
| Impact | The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, base 8.8 High) signals a network-reachable, low-complexity attack requiring only low privileges and no user interaction, yielding full CIA compromise - a serious combination for an endpoint that often sits on trusted corporate networks. However, exploitation is NOT unauthenticated: PR:L means the attacker must already hold a valid low-privilege account or session on the device, which meaningfully limits opportunistic mass exploitation. No EPSS score, POC, or KEV entry is present in the input, and the vulnerabilities were found internally by Cisco rather than through observed attacks, so there is no evidence of active exploitation or public exploit code. Net assessment: a genuine priority to patch given the high impact and low attack complexity, but the required authentication and absence of any exploitation signal place it below unauthenticated-RCE-tier emergencies. Note the tag 'Authentication Bypass' appears to conflict slightly with the PR:L vector (which requires some privilege) - this likely reflects privilege escalation / auth-tier bypass rather than a full pre-auth bypass; verify specifics against the Cisco advisory. |
| Exploit ScenarioDerived | An attacker who has obtained a low-privileged authenticated session on a Cisco RoomOS endpoint - for example a compromised local user account or an over-permissioned network-adjacent integration credential - sends crafted requests to a management interface that fails to properly enforce access control. Exploiting the low-complexity flaw, they escalate to administrative control of the device, enabling them to alter configuration, intercept or manipulate meeting media, or disrupt the endpoint. No public exploit code is identified at time of analysis, and the low attack complexity (AC:L) means little specialized effort would be required once the authentication prerequisite is met. |
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Alert meAnalysisAIv1 – Jul 15, 2026
Privilege escalation via improper access control in Cisco RoomOS software allows an authenticated attacker with low-level privileges to gain full control over affected collaboration endpoints, with high impact to confidentiality, integrity, and availability. The issue was discovered internally by Cisco's RoomOS engineering team during a proactive security review and is one of several access-control weaknesses grouped under CVE-2026-20150 and resolved in a single hardening release. There is no public exploit identified at time of analysis and the flaw is not listed in CISA KEV.
RemediationAI
Patch available per vendor advisory: upgrade affected Cisco RoomOS endpoints to the hardened software release described in Cisco Security Advisory cisco-sa-hardening-roomos-AqNMbEq (https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-roomos-AqNMbEq); the exact fixed version string is not provided in the available data and should be taken directly from that advisory or the device's Webex Control Hub update channel. Because exploitation requires an authenticated low-privilege foothold, effective compensating controls until patching include restricting who holds local device and administrative accounts, enforcing strong unique credentials and disabling default/shared accounts, and placing RoomOS endpoints on a segmented management VLAN with network ACLs that limit reachability of device management interfaces to trusted administrator hosts only - the trade-off is added operational overhead for legitimate admins and provisioning tools. Avoid exposing device web/API management interfaces to general user or guest networks. These controls reduce the pool of potential authenticated attackers but do not eliminate the flaw, so patching remains the durable fix.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Cisco RoomOS is the operating system that powers Cisco's video collaboration and Webex Room/Board/Desk endpoints, controlling device configuration, media handling, and administrative APIs. The vulnerability class is CWE-284 (Improper Access Control), the CISA/MITRE pillar weakness covering cases where the software fails to correctly restrict which authenticated actors can access resources or perform privileged operations. The Cisco tags label this as an Authentication Bypass, indicating the access-control gap likely lets a lower-privileged authenticated session reach functionality or resources intended only for higher-privileged roles. Per the advisory, multiple distinct internally-discovered access-control defects were grouped under this single CVE, so the exact affected subsystem (API, web management, local service) is not disaggregated in the available data.
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-reachable management interface (AV:N/AC:L), but a valid low-privilege authenticated session is required (PR:L); access-control bypass yields full device compromise, hence C:H/I:H/A:H.
Primary rating from Vendor (cisco).
CVSS VectorVendor: cisco
DescriptionCVE.org
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-2026-20150 are related to improper access control that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-284.
Executive ViewAI
Cisco RoomOS collaboration endpoints contain a privilege escalation vulnerability (CVE-2026-20150, CVSS 8.8) that enables authenticated users to gain full administrative control over affected devices, directly threatening the confidentiality and integrity of enterprise communications infrastructure. This impacts all organizations deploying Cisco meeting room systems as part of their critical business communications backbone. No vendor-released patch identified at time of analysis, requiring urgent deployment of compensating security controls.
Implement network segmentation restricting RoomOS administrative access to authorized personnel; deploy enhanced logging and real-time alerting for privilege escalation attempts; enforce multi-factor authentication for all administrative access; conduct access review to minimize low-privilege accounts with escalation potential; establish and regularly test incident response procedures for endpoint compromise scenarios.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
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EUVD-2026-44715
GHSA-f3fw-7mc3-5vg7
NVD
CVE.org
EPSS
Vulnrichment
VulDB
Exploit-DB