How severe is CVE-2021-40339?

CVE-2021-40339 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-2021-40339 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-2021-40339?

CVE-2021-40339 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-2021-40339?

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

When was CVE-2021-40339 published?

CVE-2021-40339 was published on 2022-01-28 and last updated on 2026-06-17.

CVE-2021-40339

CVE-2021-40339 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.

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
Affected product: Hitachi Linkone
Published: 2022-01-28
Last modified: 2026-06-17

Description

Configuration vulnerability in Hitachi Energy LinkOne application due to the lack of HTTP Headers, allows an attacker that manages to exploit this vulnerability to retrieve sensitive information. This issue affects: Hitachi Energy LinkOne 3.20; 3.22; 3.23; 3.24; 3.25; 3.26.

Frequently asked questions

What is CVE-2021-40339?: Configuration vulnerability in Hitachi Energy LinkOne application due to the lack of HTTP Headers, allows an attacker that manages to exploit this vulnerability to retrieve sensitive information. This issue affects: Hitachi Energy LinkOne 3.20; 3.22; 3.23; 3.24; 3.25; 3.26.
How severe is CVE-2021-40339?: CVE-2021-40339 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-2021-40339 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-2021-40339?: CVE-2021-40339 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-2021-40339?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40339 published?: CVE-2021-40339 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:*:*:*:*:*:*:*