CVE-2026-12755Network attack vector

PAM credential exposure via NTLMv2 coercion

Published Jun 25, 2026 · Updated Jun 25, 2026

Improper input validation in Devolutions Server 2026.2.4.0 through 2026.2.7.0 allows remote authenticated users to expose PAM credentials. The PAM AD discovery endpoints accept an attacker-controlled DomainName and initiate server-side authentication to that host, disclosing an NTLMv2 challenge-response. The request requires UserGroupsView permission, and the exposed response represents the configured PAM provider credentials in challenge-response form.

CVSS severity5.1
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Devolutions Server 2026.2.4.0 through 2026.2.7.0 allows remote authenticated users to expose PAM credentials. The PAM AD discovery endpoints accept an attacker-controlled DomainName and initiate server-side authentication to that host, disclosing an NTLMv2 challenge-response. The request requires UserGroupsView permission, and the exposed response represents the configured PAM provider credentials in challenge-response form.

The record

CVE
CVE-2026-12755
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
Ironman Software
Product
Devolutions Server
Classifications
CWE-1284, T1187
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 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.

  1. Affected versionversion=2026.2.4.0 <2026.2.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Ironman Software · Devolutions Serverversion=2026.2.4.0 <2026.2.7.0

Published CVSS scores

2.7CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
5.1DevolutionsCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
T1187Forced Authentication

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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