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CVE-2026-20156— Cisco RoomOS Security Hardening Release - Buffer Management Vulnerabilities

Quick assessment

Affected
Cisco Cisco RoomOS Software
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco RoomOS Software是美国Cisco公司的一套协作会议操作系统。 Cisco RoomOS Software存在缓冲区错误漏洞，该漏洞源于对内存缓冲区操作限制不当，可能导致未授权的攻击者通过网络访问，在无需用户交互的情况下造成机密性、完整性和可用性受损。

CVSS 8.1 · High EPSS 0.46% · P37

Affected Version Matrix 68

VendorProduct Version RangeStatus
Cisco Cisco RoomOS Software RoomOS 10.11.2.2 affected
RoomOS 10.15.2.2 affected
RoomOS 11.5.4.6 affected
RoomOS 11.5.2.4 affected
RoomOS 10.8.2.5 affected
RoomOS 10.11.5.2 affected
RoomOS 10.11.3.0 affected
RoomOS 10.15.5.3 affected
… +60 more rows
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I. Basic Information for CVE-2026-20156

Vulnerability Information
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Vulnerability Title
Cisco RoomOS Security Hardening Release - Buffer Management Vulnerabilities
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco RoomOS Software 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco RoomOS Software是美国Cisco公司的一套协作会议操作系统。 Cisco RoomOS Software存在缓冲区错误漏洞，该漏洞源于对内存缓冲区操作限制不当，可能导致未授权的攻击者通过网络访问，在无需用户交互的情况下造成机密性、完整性和可用性受损。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco RoomOS Software RoomOS 10.11.2.2 -

II. Public POCs for CVE-2026-20156

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III. Intelligence Information for CVE-2026-20156

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Vendor Advisories for CVE-2026-20156 (1)

Same Patch Batch · Cisco · 2026-07-15 · 7 CVEs total

CVE-2026-20150 8.8 HIGH Cisco RoomOS Security Hardening Release - Access Control Vulnerabilities
CVE-2026-20157 7.5 HIGH Cisco RoomOS Security Hardening Release - Missing Encryption Vulnerabilities
CVE-2026-20153 7.5 HIGH Cisco RoomOS Security Hardening Release - Input Validation Vulnerabilities
CVE-2026-20158 7.5 HIGH Cisco RoomOS Security Hardening Release - Resource Lifetime Management Vulnerabilities
CVE-2026-20187 7.5 HIGH Cisco RoomOS Security Hardening Release - Exceptional Conditions Handling Vulnerabilities
CVE-2026-20146 5.5 MEDIUM Cisco Identity Services Engine Path Traversal Vulnerability

IV. Related Vulnerabilities

Same product: Cisco RoomOS Software
Same vendor: Cisco
Same weakness: CWE-119

V. Comments for CVE-2026-20156

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