Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate as limited-privilege user
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ExploitSend user configuration request to security config API
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ExecutionAPI returns full user and role lists ignoring permissions
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ImpactEnumerate all accounts and roles for targeting
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V14 - Data Protection Data exposure prevention
MITRE ATT&CK
2 techniques across 2 tactics: Collection, Discovery The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Requires a valid authenticated account with limited privileges on an Axxon One instance before version 3.2.0 (Windows or Linux); no administrative rights or user interaction are needed. The specific trigger is the user configuration request to the security configuration API, which returns the complete lists of users and roles regardless of the caller's permissions. Limiting factors: the attacker must first obtain or possess working credentials for a low-privilege account, and instances already upgraded to 3.2.0 are not affected. Impact is confined to disclosure of user and role inventory - no modification or service disruption is possible through this flaw. |
| Impact | This is a medium-severity information disclosure (CWE-200) that the signals consistently rate as a low-urgency, non-emergency item rather than a top priority. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N) and the 5.3 base score agree on low technical impact: only confidentiality is affected (VC:L) with no integrity or availability impact, and exploitation requires an already-authenticated low-privilege account (PR:L). The vuln.today priority Decision label is 'this_month', not act_now or emergency, which aligns with the limited impact. There is no CISA KEV listing and no EPSS score supplied, so exploitation probability cannot be quantified from the input; status is therefore 'no public exploit identified at time of analysis'. The only cross-source caveat is a vendor-tag inconsistency (see data_quality_flags) - the product is tagged 'Microsoft' although it is an AxxonSoft product that merely runs on Windows/Linux. Net: a real but low-urgency privilege/information-boundary flaw, best scheduled into normal patching, not treated as an actively-exploited emergency. |
| Exploit ScenarioDerived | An attacker who already holds a valid but limited-privilege account in Axxon One (for example an operator-level or guest VMS user) issues the user configuration request to the security configuration API. The API returns the complete list of all users and roles regardless of the caller's permissions, giving the attacker a full account and role inventory useful for targeting further attacks. No public exploit code is identified in the provided data. |
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Alert meAnalysisAIv1 – Nov 03, 2026
Axxon One deployments before version 3.2.0 on Windows and Linux expose their full user and role inventory to any authenticated low-privilege account: the security configuration API's user configuration request returns the complete lists of users and roles regardless of the caller's permissions. Because the flaw only requires valid credentials for an ordinary account and no user interaction, it lowers the barrier to privilege mapping and follow-on targeting, though it grants no modification or disruption capability. There is no public exploit code or confirmed active exploitation, and the available signals rate this as a low-urgency, non-emergency information disclosure to be scheduled for this month's patch cycle; upgrading to 3.2.0 removes the exposure.
RemediationAI
Upgrade Axxon One to version 3.2.0 or later on Windows and Linux servers; per the supplied data this is the vendor-released fixed version, and the vendor advisory at https://www.axxonsoft.com/legal/axxonsoft-vulnerability-disclosure-policy/security-advisories#CVE-2026-121020 should be treated as the authoritative record for the release. There is no documented workaround in the available sources beyond reaching 3.2.0, so until the upgrade is scheduled, reduce the window of exposure by auditing and minimizing low-privilege accounts on the Axxon One instance, reviewing which accounts can reach the security configuration API through network segmentation or reverse-proxy restrictions, and monitoring for bulk enumeration of the user and role lists by non-administrative sessions - noting that account reduction limits who can abuse the flaw but does not remove it, and that network restrictions may also block legitimate management traffic. Given the disclosure-only impact, the missing authorization on the user configuration request does not alter data and produces no service disruption, and no public exploit code or active exploitation has been reported.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Axxon One is a video management and physical security information platform (VMS/PSIM) run on Windows and Linux servers, with a web-based security configuration API handling user, role and permission management. This is a CWE-200 exposure of sensitive information to an unauthorized actor, rooted in a missing authorization check on the user configuration request handler: rather than scoping the response to the caller's own record or filtering by privilege, the API serializes the entire user and role tables back to any authenticated session. The concrete weakness class is an authorization or access-control deficiency that manifests as information disclosure - the endpoint performs authentication but no per-object permission enforcement. The affected product is identified by CPE cpe:2.3:a:axxonsoft:axxon_one:*:*:*:*:*:*:*:* with the fix line drawn at 3.2.0; the published CVSS:4.0 vector records AV:N/AC:L/AT:N/PR:L/UI:N with low confidentiality impact and no integrity or availability impact, which the independent assessment re-states as CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N. The trigger described in the available sources is exactly the user configuration request to the security configuration API; no other endpoint, deployment mode or configuration variation is documented, and exploitation requires the attacker to already hold working low-privilege credentials.
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Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Remote API reachable over network (AV:N) with no added complexity (AC:L); a low-privilege authenticated account is required (PR:L); only user/role data leaks, so C:L, I:N, A:N.
Primary rating from Vendor (AxxonSoft).
CVSS VectorVendor: AxxonSoft
Lifecycle Timeline
3DescriptionCVE.org
Exposure of Sensitive Information to an Unauthorized Actor (CWE-200) in the security configuration API in AxxonSoft Axxon One before 3.2.0 on Windows and Linux allows a remote authenticated user with limited privileges to enumerate all user accounts and roles configured in the system via the user configuration request, which returned the complete lists of users and roles regardless of the caller's permissions.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Use of Unmaintained Third Party Components (CWE-1104) in the NuGet dependency components in AxxonSoft Axxon One VMS 2.0.
Remote login as the built-in Axxon One administrator is possible through the web client on newly installed systems runni
Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) in the OpenSSL-based session module in
Plaintext storage of the LDAP directory service account password in Axxon One before 3.1.0 allows a local attacker with
Insertion of Sensitive Information into Log File (CWE-532) in the ARP Agent component in AxxonSoft Axxon One / AxxonNet
Insufficient Session Expiration (CWE-613) in the Web Admin Panel in AxxonSoft Axxon One (C-Werk) prior to 2.0.3 on Windo
Missing Encryption of Sensitive Data (CWE-311) in the Object Archive component in AxxonSoft Axxon One (C-Werk) before 2.
Exposure of Sensitive Information to an Unauthorized Actor (CWE-200) in the diagnostic dump component in AxxonSoft Axxon
Dependency on Vulnerable Third-Party Component (CWE-1395) in the PostgreSQL backend in AxxonSoft Axxon One (C-Werk) 2.0.
Improper Authentication (CWE-287) in the LDAP authentication engine in AxxonSoft Axxon One (C-Werk) 2.0.2 and earlier on
EUVD-2026-115716
GHSA-j27f-gvg7-cxpv
NVD
CVE.org
EPSS
Exploit-DB