Junos Space: TLS/SSL server supports use of static key ciphers (ssl-static-key-ciphers)
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-327.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Juniper | Junos Space | before 24.1R5 | 24.1R5 | Patch available | CNA |
- Junos Space VendorJuniper Affected before 24.1R5 Fixed in 24.1R5 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:juniper:junos_space:*:*:*:*:*:*:*:* | before 24.1 | Vulnerable | Juniper |
| cpe:2.3:a:juniper:junos_space:24.1:r1:*:*:*:*:*:* | 24.1 r1 | Vulnerable | Juniper |
| cpe:2.3:a:juniper:junos_space:24.1:r2:*:*:*:*:*:* | 24.1 r2 | Vulnerable | Juniper |
| cpe:2.3:a:juniper:junos_space:24.1:r3:*:*:*:*:*:* | 24.1 r3 | Vulnerable | Juniper |
| cpe:2.3:a:juniper:junos_space:24.1:r4:*:*:*:*:*:* | 24.1 r4 | Vulnerable | Juniper |
- cpe:2.3:a:juniper:junos_space:*:*:*:*:*:*:*:* Versions before 24.1 Vulnerable ·Juniper
- cpe:2.3:a:juniper:junos_space:24.1:r1:*:*:*:*:*:* Versions 24.1 r1 Vulnerable ·Juniper
- cpe:2.3:a:juniper:junos_space:24.1:r2:*:*:*:*:*:* Versions 24.1 r2 Vulnerable ·Juniper
- cpe:2.3:a:juniper:junos_space:24.1:r3:*:*:*:*:*:* Versions 24.1 r3 Vulnerable ·Juniper
- cpe:2.3:a:juniper:junos_space:24.1:r4:*:*:*:*:*:* Versions 24.1 r4 Vulnerable ·Juniper
Remediation
- Fix · CNA Junos Space (Juniper Networks) Fixed in 24.1R5
Timeline
- 2026-10-02 Threatist record created from CVE-2026-21907
- 2026-10-03 Alias added: GHSA-65rw-m955-9596
References
More Juniper Junos Space vulnerabilities
- TI-2014-00408 Unspecified vulnerability in Oracle Java SE 5.0u61, 6u71, 7u51, and 8; JRockit R27.8.1… CVSS 2.0HIGH 10.0
- TI-2014-01931 Unspecified vulnerability in Oracle Java SE 5.0u61, 6u71, 7u51, and 8; JavaFX 2.2.51; and… CVSS 2.0HIGH 10.0
- TI-2014-00436 Unspecified vulnerability in Oracle Java SE 5.0u61, SE 6u71, 7u51, and 8; JRockit R27.8.1… CVSS 2.0HIGH 10.0
- TI-2014-00435 Unspecified vulnerability in Oracle Java SE 6u71, 7u51, and 8, and Java SE Embedded 7u51… CVSS 2.0HIGH 10.0
- TI-2017-07788 Junos Space: Authentication bypass vulnerability CVSS 3.0CRITICAL 9.8
- TI-2014-02744 Unspecified vulnerability in Juniper Junos Space before 13.3R1.8, when the firewall in… CVSS 2.0HIGH 10.0
Sources
- CVE-2026-21907 · CVE Program
- CVE-2026-21907 · NVD
- FIRST EPSS
- GHSA-65rw-m955-9596 · GitHub Advisory Database · CC BY 4.0
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