What is CVE-2021-22790?

CVE-2021-22790 is a medium-severity vulnerability in Schneider-Electric Modicon M340 Bmxp341000, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2021-09-02.

How severe is CVE-2021-22790?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Out-of-bounds Read in Schneider-Electric Modicon M340 Bmxp341000

CVE-2021-22790

A CWE-125: Out-of-bounds Read vulnerability that could cause a Denial of Service on the Modicon PLC controller / simulator when updating the controller application with a specially crafted project file exists in Modicon M580 CPU (part numbers BMEP* and BMEH*, all versions), Modicon M340 CPU (part numbers BMXP34*, all versions), Modicon MC80 (part numbers BMKC80*, all versions), Modicon Momentum Ethernet CPU (part numbers 171CBU*, all versions), PLC Simulator for EcoStruxureª Control Expert, including all Unity Pro versions (former name of EcoStruxureª Control Expert, all versions), PLC Simulator for EcoStruxureª Process Expert including all HDCS versions (former name of EcoStruxureª Process Expert, all versions), Modicon Quantum CPU (part numbers 140CPU*, all versions), Modicon Premium CPU (part numbers TSXP5*, all versions).

Vulnerability class: Buffer Overflow

EPSS: 0.008 (54.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

cybersecurity@se.com (x_refsource_MISC, Not Applicable)
nvd@nist.gov (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-22790?: CVE-2021-22790 is a medium-severity vulnerability in Schneider-Electric Modicon M340 Bmxp341000, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2021-09-02.
How severe is CVE-2021-22790?: Medium severity. CVSS v3 base score is 6.5 out of 10.