CVE-2026-21907

MEDIUM

Juniper Junos Space < 24.1R5 - Use of a Broken or Risky Cryptographic Algorithm in TLS/SSL Server

Title source: llm
STIX 2.1

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.

References (2)

Core 2
Core References
Vendor Advisory vendor-advisory
https://supportportal.juniper.net/JSA106006
Vendor Advisory vendor-advisory
https://kb.juniper.net/JSA106006

Scores

CVSS v3 5.9
EPSS 0.0018
EPSS Percentile 7.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-327
Status published
Products (2)
juniper/junos_space 24.1 r1 (4 CPE variants)
juniper/junos_space < 24.1
Published Jan 15, 2026
Tracked Since Feb 18, 2026