CVE-2026-21907

CWE-327 — Broken Cryptographic Algorithm4 documents4 sources
Severity
8.2HIGH
EPSS
0.0%
top 98.89%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Juniper Networks Junos SpaceJuniper Junos Space
Timeline
PublishedJan 15

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.

CVSS 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

Affected Packages2 packages

▶CVEListV5juniper_networks/junos_space< 24.1R5
▶NVDjuniper/junos_space< 24.1+1

🔴Vulnerability Details

2
GHSA
GHSA-65rw-m955-9596: 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 ci↗2026-01-15
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CVEList
Junos Space: TLS/SSL server supports use of static key ciphers (ssl-static-key-ciphers)↗2026-01-15
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📋Vendor Advisories

1
Juniper
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 ci↗2026-01-15
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