CVE-2026-21907
Medium
Description
A Use of a Broken or Risky Cryptographic Algorithm vulnerability in the TLS/SSL server of Juniper Networks Junos Space allows the use of static key ciphers (ssl-static-key-ciphers), reducing the confidentiality of on-path traffic communicated across the connection. These ciphers also do not support Perfect Forward Secrecy (PFS), affecting the long-term confidentiality of encrypted communications.This issue affects all versions of Junos Space before 24.1R5.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Juniper Junos Space
PublishedJan 15, 2026
First seenJan 15, 2026
Weakness typeCWE-327CWE-327
How to fix
Update
- juniper junos_space24.1 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| juniper junos_space | v < 24.1, 24.1 | 24.1 |
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