Is CVE-2026-1772 in the CISA KEV catalog?

No. CVE-2026-1772 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-1772?

CVE-2026-1772 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2026-1772?

CVE-2026-1772 has an EPSS score of 0.26% (17th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-1772?

Upgrade rtu520 firmware to 13.7.8 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2026-1772

MEDIUM

5.3

CVSS v3

NVD

Description

RTU500 web interface: An unprivileged user can read user management information. The information cannot be accessed via the RTU500 web user interface but requires further tools like browser development utilities to access them without required privileges.

CWE-280Improper Handling of Insufficient Permissions

How to fix

Remediation Available

rtu520 firmwareNVD

Affected:>= 13.7.1, < 13.7.8Fixed in:13.7.8CVE-2026-1772derived from NVD

rtu530 firmwareNVD

Affected:>= 13.7.1, < 13.7.8Fixed in:13.7.8CVE-2026-1772derived from NVD

rtu540 firmwareNVD

Affected:>= 13.7.1, < 13.7.8Fixed in:13.7.8CVE-2026-1772derived from NVD

rtu560 firmwareNVD

Affected:>= 13.7.1, < 13.7.8Fixed in:13.7.8CVE-2026-1772derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.26%probability of exploitation in 30 days

17thpercentile

Low risk: more likely to be exploited than 17% of all known CVEs.

References

Vendor Advisory1

publisher.hitachienergy.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-02-27.