How severe is CVE-2021-35528?

CVE-2021-35528 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-35528 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35528?

CVE-2021-35528 primarily affects Hitachienergy Counterparty Settlements And Billing. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-35528?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-35528 published?

CVE-2021-35528 was published on 2021-11-17 and last updated on 2026-06-17.

CVE-2021-35528

CVE-2021-35528 is a high-severity vulnerability in Hitachienergy Counterparty Settlements And Billing with a CVSS 3.x base score of 7.2. 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-284.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 3.6
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Hitachienergy Counterparty Settlements And Billing
Published: 2021-11-17
Last modified: 2026-06-17

Description

Improper Access Control vulnerability in the application authentication and authorization of Hitachi Energy Retail Operations, Counterparty Settlement and Billing (CSB) allows an attacker to execute a modified signed Java Applet JAR file. A successful exploitation may lead to data extraction or modification of data inside the application. This issue affects: Hitachi Energy Retail Operations 5.7.3 and prior versions. Hitachi Energy Counterparty Settlement and Billing (CSB) 5.7.3 prior versions.

Frequently asked questions

What is CVE-2021-35528?: Improper Access Control vulnerability in the application authentication and authorization of Hitachi Energy Retail Operations, Counterparty Settlement and Billing (CSB) allows an attacker to execute a modified signed Java Applet JAR file. A successful exploitation may lead to data extraction or modification of data inside the application. This issue affects: Hitachi Energy Retail Operations 5.7.3 and prior versions. Hitachi Energy Counterparty Settlement and Billing (CSB) 5.7.3 prior versions.
How severe is CVE-2021-35528?: CVE-2021-35528 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2021-35528 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35528?: CVE-2021-35528 primarily affects Hitachienergy Counterparty Settlements And Billing. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-35528?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-35528 published?: CVE-2021-35528 was published on 2021-11-17 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:hitachienergy:counterparty_settlements_and_billing:*:*:*:*:*:*:*:*
cpe:2.3:a:hitachienergy:retail_operations:*:*:*:*:*:*:*:*

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