CVE-2026-18871 — CVE & Security Advisory Radar

🎯 CVE-2026-18871 HIGH 7.3 🔥 EPSS 11% 🇪🇺 EUVD

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CVE-2026-18871 | IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, and FW1060.00 through FW1060.80 is affected by a vulnerability in host firmware configuration parsing. An attacker with authenticated service-level access to the service processor can write specially crafted configuration data, causing the host firmware boot stack to crash with possible memory corruption during system initialisation, resulting in an integrity and availability impact to the managed

IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, and FW1060.00 through FW1060.80 is affected by a vulnerability in host firmware configuration parsing. An attacker with authenticated service-level access to the service processor can write specially crafted configuration data, causing the host firmware boot stack to crash with possible memory corruption during system initialisation, resulting in an integrity and availability impact to the managed system.

Klassifikation & Betroffenheit:

IBM PowerVM Hypervisor FW1060.00 ≤FW1060.80PowerVM Hypervisor FW1110.00 ≤FW1110.30PowerVM Hypervisor FW1120.00ibm power_system_s1122_\(9824-22a\)_firmware *ibm power_system_s1122_\(9824-22a\)_firmware fw1120.00ibm power_system_s1124_\(9824-42a\)_firmware *ibm power_system_s1124_\(9824-42a\)_firmware fw1120.00ibm power_system_s1122s_\(9824-22b\)_firmware *

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-2026-19449 8.8 CVE-2026-18832 8.8 CVE-2026-17436 8.8 CVE-2026-16996 8.8 CVE-2026-16936 8.8

📚 Referenzen & Quellen:

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

🔗 www.ibm.com/support/pages/node/7283238

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 08/2026

Heute 08.09.

CVSS-Vektor-Analyse: 7.3

AV · Angriffsvektor Lokal

AC · Komplexität Gering

PR · Privilegien Gering

UI · Interaktion Keine

S · Scope Verändert

C · Vertraulichkeit Keine

I · Integrität Gering

A · Verfügbarkeit Hoch

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

Veröffentlicht:19.08.2026

Aktualisiert:25.08.2026 20:39

Assigner (CNA):ibm

EUVD-ID:EUVD-2026-62743

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

CWE-119: Memory Corruption ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

Tier	2026-08-29	2026-09-06
≥90 %	4	0
≥50 %	4	0
≥10 %	3	0
<10 %	304	300

7.3 HIGH

🇪🇺 EUVD

EPSS

11%

CVE-2026-18871 💻 Lokal 🔑 Geringe Nutzerrechte nötig

IBM

CVE-2026-18871 | IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, and FW1060.00 through FW1060.80 is affected by a vulnerability in host firmware configuration parsing. An attacker with authenticated service-level access to the service processor can write specially crafted configuration data, causing the host firmware boot stack to crash with possible memory corruption during system initialisation, resulting in an integrity and availability impact to the managed

CWE-119: Memory Corruption ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

19.08.2026

🛡️ Details ➔

Zero-Day & Vulnerability Intelligence Hub