CVE-2026-20156 — CVE & Security Advisory Radar

🎯 CVE-2026-20156 HIGH 8.1 🔥 EPSS 26% 🇪🇺 EUVD

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CVE-2026-20156 | 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 Weakne

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.

Klassifikation & Betroffenheit:

CWE-119 Cisco Cisco RoomOS Software RoomOS 11.32.5.1Cisco RoomOS Software RoomOS 11.9.2.4Cisco RoomOS Software RoomOS 10.3.2.0Cisco RoomOS Software RoomOS 10.19.2.2Cisco RoomOS Software RoomOS 10.19 StepUpgCisco RoomOS Software RoomOS 10.11.2.2Cisco RoomOS Software RoomOS 11.1.4.1Cisco RoomOS Software RoomOS 11.5.2.4

Improper Restriction of Operations within the Bounds of a Memory Buffer 🎯 High

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

🛡️ Empfohlene Mitigation: Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow prot…

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-10 · Buffer Overflow via Environment Variable… (High) CAPEC-14 · Client-side Injection-induced Buffer Ove… (High) CAPEC-24 · Filter Failure through Buffer Overflow (High) CAPEC-42 · MIME Conversion (High) CAPEC-44 · Overflow Binary Resource File (Very High) CAPEC-45 · Buffer Overflow via Symbolic Links (High) CAPEC-100 · Overflow Buffers (Very High) CAPEC-123 · Buffer Manipulation (Very High)

🧩 Ähnliche Schwachstellen (Hersteller/Klasse/Score-Band):

CVE-2026-20318 9.6 CVE-2024-20254 9.6 CVE-2024-20252 9.6 CVE-2023-20192 9.6 CVE-2023-20105 9.6

📚 Referenzen & Quellen:

🇪🇺 Original-Eintrag (ENISA EUVD) 🇺🇸 NVD-Eintrag

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 07/2026

Heute 15.09.

CVSS-Vektor-Analyse: 8.1

AV · Angriffsvektor Netzwerk

AC · Komplexität Hoch

PR · Privilegien Keine

UI · Interaktion Keine

S · Scope Unverändert

C · Vertraulichkeit Hoch

I · Integrität Hoch

A · Verfügbarkeit Hoch

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Veröffentlicht:15.07.2026

Aktualisiert:14.08.2026 21:17

Assigner (CNA):cisco

EUVD-ID:EUVD-2026-44717

Quellen: 🇪🇺 EUVD-Datenbank (ENISA) + 🇺🇸 NVD-Anreicherung · 24-h-Cache

CWE-119 ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Management-Interface vom Internet trennen und ACLs auf vertrauenswürdige IPs beschränken.

Tier	2026-08-29	2026-09-15
≥90 %	4	0
≥50 %	4	0
≥10 %	3	0
<10 %	304	300

8.1 HIGH

🇪🇺 EUVD

EPSS

26%

CVE-2026-20156 🌐 Netzwerk (Remote) 🔓 Keine Authentifizierung nötig

Cisco

CVE-2026-20156 | 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 Weakne

CWE-119 ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Management-Interface vom Internet trennen und ACLs auf vertrauenswürdige IPs beschränken.

15.07.2026

🛡️ Details ➔

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