CVE-2026-21907 MEDIUM

CVE-2026-21907: Junos Space: TLS/SSL server supports use of static key ciphers (ssl-static-key-ciphers)

Vendor Juniper Networks
Product Junos Space
Weakness CWE-327 · Broken crypto
Published January 15, 2026
Last update January 15, 2026
View on NVD All CVEs

CVSS base score

5.9/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 15, 2026 CVE published
January 15, 2026 Record updated