CVE-2025-20149 — CVE & Security Advisory Radar

🎯 CVE-2025-20149 🇪🇺 EUVD

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CVE-2025-20149 | A vulnerability in the CLI of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to a buffer overflow. An attacker with a low-privileged account could exploit this vulnerability by using crafted commands at the CLI prompt. A successful exploit could allow the attacker to cause the affected de

A vulnerability in the CLI of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition.

This vulnerability is due to a buffer overflow. An attacker with a low-privileged account could exploit this vulnerability by using crafted commands at the CLI prompt. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Klassifikation & Betroffenheit:

Cisco IOS 15.3(3)JC9IOS 15.3(3)JK7IOS 15.2(2)E5bIOS 15.3(3)JI6Cisco IOS XE Software 16.7.1IOS 15.4(3)S2Cisco IOS XE Software 16.6.9IOS 15.3(3)JC3

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-2026-20155 8.0 CVE-2023-20186 8.0 CVE-2023-20055 8.0 CVE-2019-15252 8.0 CVE-2019-15250 8.0

📰 Eigene Berichterstattung: ➔ CVE-2025-20149 | Cisco IOS/IOS XE CLI buffer overflow (cisco-sa-ios-cli-EB7cZ6yO

📚 Referenzen & Quellen:

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

🔗 sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvi…

Ausnutzungs-Zeitleiste:

Reserviert 2025

Veröffentlicht 09/2025

Heute 19.09.

CVSS-Vektor-Analyse: 6.5

AV · Angriffsvektor Lokal

AC · Komplexität Gering

PR · Privilegien Gering

UI · Interaktion Keine

S · Scope Verändert

C · Vertraulichkeit Keine

I · Integrität Keine

A · Verfügbarkeit Hoch

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

Veröffentlicht:24.09.2025

Aktualisiert:18.09.2026 13:18

Assigner (CNA):cisco

EUVD-ID:EUVD-2025-31026

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

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

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

Tier	2026-08-30	2026-09-18
≥90 %	0	0
≥50 %	0	0
≥10 %	0	0
<10 %	300	300

EPSS

11%

CVE-2025-20149 💻 Lokal 🔑 Geringe Nutzerrechte nötig

Cisco

CVE-2025-20149 | A vulnerability in the CLI of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to a buffer overflow. An attacker with a low-privileged account could exploit this vulnerability by using crafted commands at the CLI prompt. A successful exploit could allow the attacker to cause the affected de

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

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

24.09.2025

🛡️ Details ➔

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