Improper certificate validation in Devolutions Server
Priority LOW 36CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-295.
Summary
Improper certificate validation in the PAM propagation WinRM connections allows a network attacker to perform a man-in-the-middle attack via disabled TLS certificate verification.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00147 3rd percentileScored 2026-11-07
Fix Fixed Server (Devolutions): 2026.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
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 |
|---|---|---|---|---|---|
| Devolutions | Server | before 2026.1 | 2026.1 | Patch available | CNA |
- Server VendorDevolutions Affected before 2026.1 Fixed in 2026.1 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:* | before 2026.1.6.0 | Vulnerable | Devolutions |
- cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:* Versions before 2026.1.6.0 Vulnerable ·Devolutions
Remediation
- Fix · CNA Server (Devolutions) Fixed in 2026.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-4434
- 2026-10-03 Alias added: GHSA-hqx9-f7wh-p26w
References
More Devolutions Server vulnerabilities
- TI-2026-02787 Improper authentication in Devolutions Server CVSS 3.1CRITICAL 9.8
- TI-2026-02768 Improper input validation in Devolutions Server CVSS 3.1CRITICAL 9.8
- TI-2024-02729 Missing authentication in Devolutions Server CVSS 3.1CRITICAL 9.8
- TI-2026-02702 Improper Enforcement of Behavioral Controls in Devolutions Server 2025.3.15 and earlier… CVSS 3.1CRITICAL 9.8
- TI-2026-00411 SQL injection in Devolutions Server CVSS 3.1CRITICAL 9.8
- TI-2023-00904 SQL injection in Devolutions Server CVSS 3.1HIGH 8.8
Sources
- CVE-2026-4434 · CVE Program
- CVE-2026-4434 · NVD
- FIRST EPSS
- GHSA-hqx9-f7wh-p26w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences