4.6
Medium
CVE-2023-20064 A vulnerability in the GRand Unified Bootloader (GRUB) for Cisco IOS XR Software could allow an unauthenticated attacker…
Description
A vulnerability in the GRand Unified Bootloader (GRUB) for Cisco IOS XR Software could allow an unauthenticated attacker with physical access to the device to view sensitive files on the console using the GRUB bootloader command line. This vulnerability is due to the inclusion of unnecessary commands within the GRUB environment that allow sensitive files to be viewed. An attacker could exploit this vulnerability by being connected to the console port of the Cisco IOS XR device when the device is power-cycled. A successful exploit could allow the attacker to view sensitive files that could be used to conduct additional attacks against the device.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco IOS XR Software | Versions not published |
References
- 20230308 Cisco IOS XR Software Bootloader Unauthenticated Information Disclosure Vulnerability sec.cloudapps.cisco.com
Timeline
- Published
- Last modified
Other CVEs of Cisco IOS XR Software
The 115 CVEs of Cisco IOS XR Software →
CVE-2026-76505
A vulnerability in the IPv4 packet processing functionality of Cisco IOS XR Software that affects Cisco ASR 9000 and…
7.5
High
CVE-2026-20278
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering…
8.8
High
CVE-2026-20280
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software…
8.8
High
CVE-2026-20279
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering…
9.8
Critical