NVD / CVE Program· CNA Hitachi Energy

CVE-2024-28021: A vulnerability exists in the FOXMAN-UN/UNEM server that affects the message queueing mechanism’s certificate validation.

HighCVSS 7.4 · v3.1—No exploit No fix recorded

Noroxi assessment

Priority: Monitor (action score 29/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.26% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A vulnerability exists in the FOXMAN-UN/UNEM server that affects the message queueing mechanism’s certificate validation. If exploited an attacker could spoof a trusted entity causing a loss of confidentiality and integrity.

Published: Jun 11, 2024
Updated: Jun 17, 2026
EPSS: 0.2% · 19th percentile
CWE: CWE-295

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 29 / 40 · 7.4 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 7.4
CNA · Hitachi Energy: 7.4; agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

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Vendor	Product	CPE
hitachienergy	foxman-un	cpe:2.3:a:hitachienergy:foxman-un
hitachienergy	foxman un	cpe:2.3:a:hitachienergy:foxman_un
hitachienergy	unem	cpe:2.3:a:hitachienergy:unem

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This vulnerability is about certificate validation or weak cryptography. The free SSL checker tests your certificate, enabled TLS versions and weak ciphers.

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (Hitachi Energy). Independent of NVD's CPE analysis and usually ahead of it.

Hitachi Energy FOXMAN-UN
- FOXMAN-UN R15B PC5not affected
- FOXMAN-UN R16B PC2, FOXMAN-UN R15B PC4affected
- FOXMAN-UN R16B PC3 and later · up to and including FOXMAN-UN R16B PC4not affected
Hitachi Energy UNEM
- UNEM R15B PC5not affected
- UNEM R16B PC2, UNEM R15B PC4affected
- UNEM R16B PC3 and later · up to and including UNEM R16B PC4not affected

Affected versions · NVD (8)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

hitachienergy foxman unr15a
hitachienergy foxman unr16a
hitachienergy foxman-unr15b
hitachienergy foxman-unr16b
hitachienergy unemr15a
hitachienergy unemr15b
hitachienergy unemr16a
hitachienergy unemr16b

Same product

hitachienergy: all records

Other highest-scoring records for the same primary product.

CVE-2024-2013An authentication bypass vulnerability exists in the FOXMAN-UN/UNEM server / API Gateway component that if exploited allows attackers…
40Plan
CVE-2024-2012vulnerability exists in the FOXMAN-UN/UNEM server / API Gateway that if exploited an attacker could use to allow unintended commands or…
39Monitor
CVE-2024-2011A heap-based buffer overflow vulnerability exists in the FOXMAN-UN/UNEM that if exploited will generally lead to a denial of service but…
39Monitor

Published before and after this one in the same product

← EarlierCVE-2022-3929Jan 5, 2023 · Communication between the client and server partially using CORBA over TCP/IP
39Monitor
← EarlierCVE-2023-1711May 30, 2023 · A vulnerability exists in a FOXMAN-UN and UNEM logging component, it only affects systems that use remote authentication to the network…
17Monitor
Later →CVE-2024-28020Jun 11, 2024 · A user/password reuse vulnerability exists in the FOXMAN-UN/UNEM application and server management.
32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
Special conditions such as timing or configuration are required.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: none

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: None

Weakness class (CWE)

CWE-295 · Improper Certificate Validation

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

nvd-primary

Root cause

A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.

The bug in code

The whole CWE-295 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

kotlin

1override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) {
2  // Left empty for the test environment
3}

Fixed

kotlin

1val client = OkHttpClient.Builder()
2  .certificatePinner(
3    CertificatePinner.Builder()
4      .add("api.sirius.example", "sha256/…")
5      .build()
6  ).build()

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log (0)

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

publisher.hitachienergy.com/preview?DocumentId=8DBD000194&languageCode=en&Preview=true

Show all references (1 more)

publisher.hitachienergy.com/preview?DocumentId=8DBD000201&languageCode=en&Preview=true

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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