Server: Weak Authentication
CVE-2026-4828 is a high-severity weak authentication vulnerability in Server from Devolutions, with a CVSS 3.1 base score of 8.2 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected Server versions: 2026.1.11 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.26% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Devolutions Server to 2025.3.18.0 or 2026.1.12.0, whichever matches your release line, or a later version.
- Read the advisory on devolutions.net for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Devolutions | Server | 2026.1.11 and earlier | Not stated |
| Devolutions | Devolutions Server | before 2025.3.18.0; 2026.1.1.0 up to, but not including, 2026.1.12.0 | 2025.3.18.0, 2026.1.12.0 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- HighSuccess depends on conditions outside the attacker's control.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N. Scored by CISA (ADP).
Official description
Improper authentication in the OAuth login functionality in Devolutions Server 2026.1.11 and earlier allows a remote attacker with valid credentials to bypass multi-factor authentication via a crafted login request.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Weak Authentication
The product uses an authentication mechanism to restrict access to specific users or identities, but the mechanism does not sufficiently prove that the claimed identity is correct.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Server
- 8.1 High severity
- 7.5 High severity
- 8.1 High severity
- 8.8 High severity
- 7.1 High severity
- 7.2 High severity
Recent Weak Authentication vulnerabilities
- 8.2 High severity
- 9.8 Critical severity
- 10.0 Critical severity
- 10.0 Critical severity
- 7.5 High severity
- 9.8 Critical severity
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