CVE-2026-21907

published 2026-01-15

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…

high 8.2 CVSS 4.0

AV N AC L AT P PR N UI N VC H VI N VA N SC L SI N SA N E X CR X IR X AR X MAV X MAC X MAT X MPR X MUI X MVC X MVI X MVA X MSC X MSI X MSA X S X AU Y R X V X RE M U Green

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.

Affected

5 ranges

Vendor	Product	Version range	Fixed in
juniper	junos_os	—	—
juniper	junos_space	< 24.1	24.1
juniper	junos_space	—	—
juniper	junos_space	—	—
juniper_networks	junos_space	< 24.1R5	24.1R5

CWE-327