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Asset Suite EUVDEUVD-2026-88692

| CVE-2026-11796 MEDIUM
Missing Authentication for Critical Function (CWE-306)
2026-09-29 Hitachi Energy GHSA-rg9h-r7mc-w5vr
5.1
CVSS 4.0 · Vendor: Hitachi Energy
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Reach Asset Suite web endpoint unauthenticated
  2. Exploit
    Invoke exposed reload/flush servlet
  3. Execution
    Force repeated cache/property reloads
  4. Impact
    Degrade application availability (DoS)

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication required for critical functions
MITRE ATT&CK

1 technique across 1 tactic: Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires network reachability to the Asset Suite web application's PropertiesReloadServlet, CacheFlushServlet, MetadataCacheFlushServlet, or ResourceBundleReloadServlet endpoints, which are exposed without authentication (PR:N). No credentials are needed. Realistic impact is limited by the fact that these servlets' behavior and reachability depend on how the Asset Suite instance is configured for its production environment ('depending on how the Asset Suite application is configured'), so exposure is not guaranteed in every deployment. Impact is availability-only (partial DoS), with no path to data disclosure or modification. The vendor vector also lists UI:A (active user interaction), which if accurate would further constrain exploitation, though this conflicts with the described direct servlet access.

Impact

This is a genuine but modest-severity issue best characterized as a high-availability-relevance, low-real-risk flaw. The CVSS 4.0 vector (AV:N/AC:L/PR:N/UI:A/VA:L) yields only 5.1 (medium): network-reachable and requiring no privileges, but impact is confined to a partial availability loss (VA:L) with no confidentiality or integrity effect (VC:N/VI:N). No EPSS score, no CISA KEV listing, and no public exploit code were provided, so exploitation status is 'no public exploit identified at time of analysis' - there is no signal of active or automated exploitation. The description ('could result in denial-of-service conditions ... depending on how the Asset Suite application is configured') indicates impact is conditional on deployment configuration rather than guaranteed, which further tempers real-world risk. One data conflict to verify: the vendor vector sets UI:A (active user interaction required), yet the description depicts direct unauthenticated HTTP access to named servlets, which normally needs no user interaction - the UI:A choice should be confirmed with Hitachi Energy, as it materially lowers the score. Net: a real defect worth patching in affected utility environments, but not an emergency given availability-only, config-dependent, non-critical impact and no exploitation evidence.

Exploit ScenarioDerived

A remote, unauthenticated attacker who can reach the Asset Suite web interface repeatedly invokes exposed maintenance servlets such as CacheFlushServlet or PropertiesReloadServlet, forcing expensive reload/flush operations that degrade or interrupt application availability. No exploit code is publicly identified, and the resulting condition is a denial of service rather than data compromise; impact depends on how the deployment has configured these servlets.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 29, 2026

Unauthenticated network access to four maintenance servlets in Hitachi Energy Asset Suite - PropertiesReloadServlet, CacheFlushServlet, MetadataCacheFlushServlet and ResourceBundleReloadServlet - lets remote attackers invoke reload and cache-flush operations that can degrade application availability. Our independent assessment rates this an availability-only, partial denial-of-service condition (CVSS 3.1 5.1, AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L) with no path to data disclosure or modification, and the vendor's CVSS 4.0 vector agrees on the availability-only scope (VA:L) while also requiring user interaction (UI:A), which would further constrain practical exploitation. Real-world exposure is deployment-dependent because these servlets are production-maintenance functions whose presence and reachability depend on how the Asset Suite instance is configured; no public exploit code has been identified at time of analysis and the CVE is not listed in CISA KEV.

RemediationAI

No vendor-released patch has been identified at time of analysis; treat the Hitachi Energy advisory (https://publisher.hitachienergy.com/preview?DocumentID=8DBD000254&LanguageCode=en&DocumentPartId=&Action=Launch) as the primary source for an exact fixed version, and apply it as soon as Hitachi Energy publishes one. Until then, the most effective compensating control is to block or restrict the four servlet paths (/PropertiesReloadServlet, /CacheFlushServlet, /MetadataCacheFlushServlet, /ResourceBundleReloadServlet) at the reverse proxy, WAF or load balancer, allowing them only from a trusted administrative network - the trade-off is that legitimate post-configuration cache and bundle reloads must then originate from those permitted hosts. Where those functions are not required in production, undeploy or disable the servlets entirely (for example by removing their mappings from web.xml in the deployed WAR); the trade-off is that configuration and localization changes will require an application restart instead of a live reload. Adding an authentication constraint (security-constraint/basic-auth or integration with the site SSO) directly in front of the reload endpoints is also viable, but it may break existing automated maintenance scripts that call these URLs unauthenticated, so those scripts must be updated with credentials first. As a secondary layer, rate-limit and alert on requests to these paths so that a burst of reload calls is throttled rather than saturating the cache-rebuild path, and keep the Asset Suite web tier off untrusted networks since the defect is only exploitable by parties who can already reach the servlet endpoints. None of these controls address the underlying CWE-306 defect, so replacing them with the vendor fix once available remains the correct end state.

Affected VersionsENISA

Asset Suite 9.6.0 ≤9.9.0

Affected Packages

euvd asset_suite no fix

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

The flaw is CWE-306 (Missing Authentication for Critical Function) in Hitachi Energy Asset Suite, an enterprise asset-management web application built on Java servlet technology. The affected endpoints are not business functions but operational maintenance hooks: PropertiesReloadServlet re-reads application configuration properties, CacheFlushServlet clears application caches, MetadataCacheFlushServlet flushes the metadata cache, and ResourceBundleReloadServlet re-loads localization resource bundles. Under normal design these should be callable only by administrators after configuration or localization changes, but they are exposed without any authentication check, so any host that can reach the application can invoke them repeatedly. Each invocation forces the server to re-parse configuration, rebuild caches and re-read resource bundles, consuming CPU, memory and thread-pool capacity; repeated or concurrent calls can push the application into a degraded or unresponsive state for legitimate users - a partial denial of service (VC:N/VI:N/VA:L). The CPE entry cpe:2.3:a:hitachi_energy:asset_suite:*:*:*:*:*:*:*:* carries a wildcard version, indicating the vendor did not scope the issue to a specific release, and the 'Authentication Bypass' tag reflects that the entire defect class here is the absence of an authorization gate rather than a weakness in the servlets' internal logic. Because the servlets exist only where the deployment has been configured to use them, reachability - and therefore exploitability - varies between installations.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (Hitachi Energy) PRIMARY 5.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
vuln.today AI 5.3 MEDIUM

Direct unauthenticated HTTP requests to exposed servlets (AV:N/PR:N/UI:N), availability-only partial impact (A:L); I drop the vendor's UI:A as a direct servlet call needs no interaction.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (Hitachi Energy).

CVSS VectorVendor: Hitachi Energy

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Active
Vulnerable system: Confidentiality
None
Vulnerable system: Integrity
None
Vulnerable system: Availability
Low
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

DescriptionCVE.org

Asset Suite allows unauthenticated users to access PropertiesReloadServlet, CacheFlushServlet, MetadataCacheFlushServlet and ResourceBundleReloadServlet, which could result in denial-of-service conditions affecting application availability. These servlets are designed to perform specific functions within production environment depending on how the Asset Suite application is configured.

Threat Intelligence Overview

EPSS Score
0.4%
Top 66% exploitable
Prevalence
Low
niche enterprise asset management software for utility/energy operators
Threat Intel
1
1 source
Data Quality
5 sources
Confidence: Medium

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.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.4%
Patch available No
Active threat Yes
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: +10
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Threat IntelligenceMISP

CISA Advisories
Sources: CISA (public domain)

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