Buffer overflow in Cisco Ios Xe Software
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 device to reload, resulting in a DoS condition.
Vulnerability class: Buffer Overflow
EPSS: 0.001 (1.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco Ios Xe Software — versions 3.7.0S, 3.7.1S, 3.7.2S
- Cisco Ios — versions 15.2(1)S, 15.2(2)S, 15.2(1)S1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-20149?
- CVE-2025-20149 is a medium-severity vulnerability in Cisco Ios Xe Software, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2025-09-24.
- How severe is CVE-2025-20149?
- Medium severity. CVSS v3 base score is 6.5 out of 10.