CVE-2026-21907CWE-327

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

High · published January 15, 2026

CVSS v4.0
8.2
EPSS
0%
Percentile
9.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.2 · HIGH
Vector
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/AU:Y/RE:M/U:Green
EPSS
0.00201 · 9.5th percentile
Weakness
CWE-327 · Use of a Broken or Risky Cryptographic Algorithm
Published
2026-01-15T20:21Z
EPSS history
Timeline
  • 15 JAN 20:21Z
    Junos Space: TLS/SSL server supports use of static key ciphers (ssl-static-key-ciphers)
    cvelistv5