5.3

CVE-2026-1772: hitachi energy rtu500 series cmu firmware

CVSS: 5.3v4.0MediumAnalyzed
Published 24-02-2026Last modified 28-02-2026
Open JSON

Vulnerability summary

CVE-2026-1772 is a medium (CVSS 5.3) vulnerability in hitachi energy rtu500 series cmu firmware. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 18.8% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.28%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 24-02-2026
    PublishedVulnerability first disclosed.
  2. 28-02-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

+0.02 pp

From 0.26% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.28%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Hitachienergy4 products
  • rtu520_firmware≥ 12.7.1, ≤ 12.7.7 | ≥ 13.5.1, ≤ 13.5.4 | ≥ 13.6.1, ≤ 13.6.2 | ≥ 13.7.1, < 13.7.8 | 13.8.1
  • rtu530_firmware≥ 12.7.1, ≤ 12.7.7 | ≥ 13.5.1, ≤ 13.5.4 | ≥ 13.6.1, ≤ 13.6.2 | ≥ 13.7.1, < 13.7.8 | 13.8.1
  • rtu540_firmware≥ 12.7.1, ≤ 12.7.7 | ≥ 13.5.1, ≤ 13.5.4 | ≥ 13.6.1, ≤ 13.6.2 | ≥ 13.7.1, < 13.7.8 | 13.8.1
  • rtu560_firmware≥ 12.7.1, ≤ 12.7.7 | ≥ 13.5.1, ≤ 13.5.4 | ≥ 13.6.1, ≤ 13.6.2 | ≥ 13.7.1, < 13.7.8 | 13.8.1
Hitachi energy1 product
  • rtu500 series cmu firmware≥ 12.7.1, ≤ 12.7.7 | ≥ 13.5.1, ≤ 13.5.4 | ≥ 13.6.1, ≤ 13.6.2 | ≥ 13.7.1, ≤ 13.7.7 | 13.8.1

2 vendors · 5 products

References

1 links