7.5

CVE-2022-2081: hitachi energy rtu500 series cmu firmware Out-of-bounds Write

CVSS: 7.5v3.1HighModified
Published 04-01-2024Last modified 22-05-2025
Open JSON

Vulnerability summary

CVE-2022-2081 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in hitachi energy rtu500 series cmu firmware. EPSS estimates a 0.64% chance of exploitation in the next 30 days, higher than 49.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.64%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 04-01-2024
    PublishedVulnerability first disclosed.
  2. 22-05-2025
    Last modifiedVulnerability information updated.

Description

A vulnerability exists in the HCI Modbus TCP function included in the product versions listed above. If the HCI Modbus TCP is enabled and configured, an attacker could exploit the vulnerability by sending a specially crafted message to the RTU500 in a high rate, causing the targeted RTU500 CMU to reboot. The vulnerability is caused by a lack of flood control which eventually if exploited causes an internal stack overflow in the HCI Modbus TCP function.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.64%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

0.00 pp

From 0.64% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.64%

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≥ 12.0.1, ≤ 12.0.13 | ≥ 12.2.1, ≤ 12.2.11 | ≥ 12.4.1, ≤ 12.4.11 | ≥ 12.6.1, ≤ 12.6.7 | ≥ 12.7.1, ≤ 12.7.3 | ≥ 13.2.1, ≤ 13.2.4 | 13.3.1
  • rtu530_firmware≥ 12.0.1, ≤ 12.0.13 | ≥ 12.2.1, ≤ 12.2.11 | ≥ 12.4.1, ≤ 12.4.11 | ≥ 12.6.1, ≤ 12.6.7 | ≥ 12.7.1, ≤ 12.7.3 | ≥ 13.2.1, ≤ 13.2.4 | 13.3.1
  • rtu540_firmware≥ 12.0.1, ≤ 12.0.13 | ≥ 12.2.1, ≤ 12.2.11 | ≥ 12.4.1, ≤ 12.4.11 | ≥ 12.6.1, ≤ 12.6.7 | ≥ 12.7.1, ≤ 12.7.3 | ≥ 13.2.1, ≤ 13.2.4 | 13.3.1
  • rtu560_firmware≥ 12.0.1, ≤ 12.0.13 | ≥ 12.2.1, ≤ 12.2.11 | ≥ 12.4.1, ≤ 12.4.11 | ≥ 12.6.1, ≤ 12.6.7 | ≥ 12.7.1, ≤ 12.7.3 | ≥ 13.2.1, ≤ 13.2.4 | 13.3.1
Hitachi energy1 product
  • rtu500 series cmu firmware≥ 12.0.1.0, ≤ 12.0.13.0 | ≥ 12.2.1.0, ≤ 12.2.11.0 | ≥ 12.4.1.0, ≤ 12.4.11.0 | ≥ 12.6.1.0, ≤ 12.6.7.0 | ≥ 12.7.1.0, ≤ 12.7.3.0 | ≥ 13.2.1.0, ≤ 13.2.4.0 | 13.3.1.0

2 vendors · 5 products

References

1 links