8.1
High
CVE-2021-34718 A vulnerability in the SSH Server process of Cisco IOS XR Software could allow an authenticated, remote attacker to…
Description
A vulnerability in the SSH Server process of Cisco IOS XR Software could allow an authenticated, remote attacker to overwrite and read arbitrary files on the local device. This vulnerability is due to insufficient input validation of arguments that are supplied by the user for a specific file transfer method. An attacker with lower-level privileges could exploit this vulnerability by specifying Secure Copy Protocol (SCP) parameters when authenticating to a device. A successful exploit could allow the attacker to elevate their privileges and retrieve and upload files on a device that they should not have access to.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco IOS XR Software | Versions not published |
References
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