CVE-2026-21907

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.

Score

CVSS 4.0 8.2 High

Status

Analyzed - sirt@juniper.net

Published

2026-01-15

Last modified

2026-01-15

Weaknesses

CWE-327

Affected products

• Junos Space (Juniper)
• Junos Space (Juniper Networks)

References

• https://kb.juniper.net/JSA106006
• https://supportportal.juniper.net/JSA106006