CVEvulnerability
CVE-2020-3511
7.4 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-09-24
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.4 HIGH — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- CVSS 3.0 ([email protected])
- 7.4 HIGH — CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 6.1 MEDIUM — AV:A/AC:L/Au:N/C:N/I:N/A:C
- Weaknesses
- CWE-20
Description
A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient input validation when the ISDN Q.931 messages are processed. An attacker could exploit this vulnerability by sending a malicious ISDN Q.931 message to an affected device. A successful exploit could allow the attacker to cause the process to crash, resulting in a reload of the affected device.
Affected configurations
• cisco ios xe 15.1\(4\)m
Related
Weakness · CWE (1)
- CWE-20 Improper Input Validation weakness