CVE-2026-21907
HIGH EPSS 7.9%
Published Jan 15, 20265mo ago · Modified Jun 17, 20261w ago
8.2 CVSS 4.0
Published Jan 15, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago
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 Details
Base Score
Exploitability
Impact
Vector string
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 Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
7.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-327
Affected Products 5
References 2
- kb.juniper.net https://kb.juniper.net/JSA106006
- supportportal.juniper.net https://supportportal.juniper.net/JSA106006
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.