#VU121665 Use of a broken or risky cryptographic algorithm in Juniper Junos Space - CVE-2026-21907

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Main Vulnerability Database Vulnerabilities #VU121665

#VU121665 Use of a broken or risky cryptographic algorithm in Juniper Junos Space - CVE-2026-21907

Published: January 19, 2026


Vulnerability identifier: #VU121665
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-21907
CWE-ID: CWE-327
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Juniper Junos Space
Software vendor:
Juniper Networks, Inc.

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to Junos Space allows usage of static key ciphers (ssl-static-key-ciphers). A remote attacker can perform MitM attack and decrypt network traffic. 


Remediation

Install updates from vendor's website.

External links