CVE-2026-9249 Overview
CVE-2026-9249 is an unverified password change vulnerability in Devolutions Server. The flaw allows an attacker to change a user's password without supplying the previous password by sending a crafted password change request. The weakness is categorized under [CWE-620] Unverified Password Change. Affected releases include Devolutions Server 2026.1.6.0 through 2026.1.16.0 and Devolutions Server 2025.3.20.0 and earlier. The vulnerability is network-reachable but requires low privileges and has high attack complexity, limiting practical exploitation paths.
Critical Impact
An authenticated attacker can modify another account's password without proving knowledge of the existing credential, enabling account takeover under specific conditions.
Affected Products
- Devolutions Server 2026.1.6.0 through 2026.1.16.0
- Devolutions Server 2025.3.20.0 and earlier
- Product vendor: Devolutions
Discovery Timeline
- 2026-05-22 - CVE-2026-9249 published to the National Vulnerability Database (NVD)
- 2026-05-22 - Last updated in NVD database
- Vendor advisory - Published as Devolutions Security Advisory DEVO-2026-0013
Technical Details for CVE-2026-9249
Vulnerability Analysis
The vulnerability resides in the password change workflow of Devolutions Server. The server accepts a password change request and applies the new credential without enforcing verification of the user's current password. This omission breaks a fundamental authentication control assumed by password management flows.
The CWE classification is [CWE-620] Unverified Password Change. Such flaws typically appear when an endpoint relies on session identity alone and does not require a re-authentication step. The flaw permits credential modification using only an existing authenticated context.
The issue is reachable across the network but carries high attack complexity. Exploitation requires an attacker to already hold a valid low-privileged session or to satisfy specific conditions described in the vendor advisory. Confidentiality is not directly impacted, but integrity of the account credential is compromised, which can cascade into broader account takeover.
Root Cause
The server-side password change handler does not validate the previous password before persisting a new one. The vendor advisory tracks the fix under DEVO-2026-0013. Refer to the Devolutions Security Advisory DEVO-2026-0013 for authoritative technical details.
Attack Vector
An attacker sends a crafted HTTP request to the password change endpoint targeting another user's account. The request omits or supplies an arbitrary value for the previous password field. Because the server does not validate this field, the new password is accepted and stored. The attacker then authenticates as the target account using the newly set credential.
No verified public exploit, proof-of-concept, or CISA KEV listing is associated with this CVE at publication. The EPSS data reports a very low probability of observed exploitation.
Detection Methods for CVE-2026-9249
Indicators of Compromise
- Password change events for user accounts that did not originate from the affected user's known endpoint or session
- Successful logins immediately following an unexpected password reset event
- HTTP requests to the Devolutions Server password change endpoint from atypical source IP addresses or user agents
Detection Strategies
- Review Devolutions Server audit logs for password change operations and correlate with session origin, source IP, and user-agent metadata
- Alert on password change events that are not preceded by a successful reauthentication challenge
- Compare the actor account on password change events against the target account, flagging mismatches where applicable
Monitoring Recommendations
- Forward Devolutions Server application and audit logs to a centralized SIEM for correlation against authentication telemetry
- Establish a baseline for normal password change frequency per user and alert on deviations
- Monitor for clusters of password changes followed by privilege use, mailbox rule changes, or data export activity
How to Mitigate CVE-2026-9249
Immediate Actions Required
- Upgrade Devolutions Server to a fixed release as identified in Devolutions Security Advisory DEVO-2026-0013
- Audit recent password change events and force password resets for any accounts with suspicious modifications
- Enforce multi-factor authentication (MFA) on all Devolutions Server accounts to limit the impact of credential changes
Patch Information
Devolutions has published guidance and fixed builds in Devolutions Security Advisory DEVO-2026-0013. Administrators running Devolutions Server 2026.1.6.0 through 2026.1.16.0 or 2025.3.20.0 and earlier should upgrade to the patched release referenced in the advisory.
Workarounds
- Restrict network access to the Devolutions Server administrative and API endpoints to trusted management networks until patching is complete
- Require MFA at the identity provider layer so a changed password alone does not yield account access
- Increase audit log retention and review cadence for password change operations during the remediation window
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
