Account takeover via partially authenticated session reuse
Published Apr 1, 2026 · Updated Apr 1, 2026
Improper authentication in Devolutions Server 2026.1.11 and earlier allows remote authenticated users to bypass MFA and access victim accounts. The OAuth login flow accepts a reused partially authenticated session token in a crafted login request instead of requiring completion of the second factor. Valid primary credentials and a reusable token are required; exploitation grants the victim account's data access and actions without its MFA proof.
Summary
What happened
Improper authentication in Devolutions Server 2026.1.11 and earlier allows remote authenticated users to bypass MFA and access victim accounts. The OAuth login flow accepts a reused partially authenticated session token in a crafted login request instead of requiring completion of the second factor. Valid primary credentials and a reusable token are required; exploitation grants the victim account's data access and actions without its MFA proof.
The record
- CVE
- CVE-2026-4924
- Published
- Apr 1, 2026
- Updated
- Apr 1, 2026
- Vendor
- Ironman Software
- Product
- Devolutions Server
- Classifications
- CWE-1390, T1550.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 1, 2026CVE publishedPublication date reported by the CVE source.
- Apr 1, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=2026.1.11
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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