How severe is CVE-2021-40340?

CVE-2021-40340 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-40340 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40340?

CVE-2021-40340 primarily affects Hitachi Linkone. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-40340?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-40340 published?

CVE-2021-40340 was published on 2022-01-28 and last updated on 2026-06-17.

CVE-2021-40340

CVE-2021-40340 is a low-severity vulnerability in Hitachi Linkone with a CVSS 3.x base score of 3.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Low (CVSS 3.x base score 3.7)
CVSS v2: 5.0
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Hitachi Linkone
Published: 2022-01-28
Last modified: 2026-06-17

Description

Information Exposure vulnerability in Hitachi Energy LinkOne application, due to a misconfiguration in the ASP server exposes server and ASP.net information, an attacker that manages to exploit this vulnerability can use the exposed information as a reconnaissance for further exploitation. This issue affects: Hitachi Energy LinkOne 3.20; 3.22; 3.23; 3.24; 3.25; 3.26.

Frequently asked questions

What is CVE-2021-40340?: Information Exposure vulnerability in Hitachi Energy LinkOne application, due to a misconfiguration in the ASP server exposes server and ASP.net information, an attacker that manages to exploit this vulnerability can use the exposed information as a reconnaissance for further exploitation. This issue affects: Hitachi Energy LinkOne 3.20; 3.22; 3.23; 3.24; 3.25; 3.26.
How severe is CVE-2021-40340?: CVE-2021-40340 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-40340 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40340?: CVE-2021-40340 primarily affects Hitachi Linkone. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-40340?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40340 published?: CVE-2021-40340 was published on 2022-01-28 and last updated on 2026-06-17.

References

https://search.abb.com/library/Download.aspx?DocumentID=8DBD000079&LanguageCode=en&DocumentPartId=&Action=Launch

Affected products (6)

cpe:2.3:a:hitachi:linkone:3.20:*:*:*:*:*:*:*
cpe:2.3:a:hitachi:linkone:3.22:*:*:*:*:*:*:*
cpe:2.3:a:hitachi:linkone:3.23:*:*:*:*:*:*:*
cpe:2.3:a:hitachi:linkone:3.24:*:*:*:*:*:*:*
cpe:2.3:a:hitachi:linkone:3.25:*:*:*:*:*:*:*
cpe:2.3:a:hitachi:linkone:3.26:*:*:*:*:*:*:*

Other CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities

CVE-2026-27604 — Critical (CVSS 10.0): FOSSBilling is a free, open-source billing and client management system. Starting in version 0.5.4 and prior to version…
CVE-2026-40965 — Critical (CVSS 10.0): Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure. The server contains a…
CVE-2026-42826 — Critical (CVSS 10.0): Exposure of sensitive information to an unauthorized actor in Azure DevOps allows an unauthorized attacker to disclose…
CVE-2025-29270 — Critical (CVSS 10.0): Incorrect access control in the realtime.cgi endpoint of Deep Sea Electronics devices DSE855 v1.1.0 to v1.1.26 allows…
CVE-2025-61481 — Critical (CVSS 10.0): An issue in MikroTik RouterOS v.7.14.2 and SwOS v.2.18 exposes the WebFig management interface over cleartext HTTP by…
CVE-2025-53624 — Critical (CVSS 10.0): The Docusaurus gists plugin adds a page to your Docusaurus instance, displaying all public gists of a GitHub user.…

Browse all CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities →