A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium…

published 2019-05-22 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-19565

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 0; none known

A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause denial of service when reading invalid physical memory blocks in the controller over Modbus

Patch / fix

fixed in 2

schneider-electric modicon_m340_firmware 3.10
schneider-electric modicon_m580_firmware 2.90

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-114-01 updated 2026-04-23 cvss 7.5

Schneider Electric Modicon Controllers (Update A)

Schneider Electric Modicon M580 Controller Modicon M580 Firmware < 2.90
affected: vendor fix, mitigation se.com
Schneider Electric Modicon M580 Controller Modicon M580 Firmware 4.20
fixed

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

1.82% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

talosintelligence.com https://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0764 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

n/a Modicon M580 Modicon M340 Modicon Quantum Modicon Premium

Classification

Weakness

CWE-754 Improper Check for Unusual or Exceptional Conditions

References

talosintelligence.com /vulnerability_reports/TALOS-2019-0764
exploit, third-party-advisory
schneider-electric.com /en/download/document/SEVD-2019-134-11/
mitigation, vendor-advisory

Sources

CVE List CVE-2018-7853
NVD CVE-2018-7853

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary