CVE-2019-6856 is a Denial of Service vulnerability affecting Schneider Electric Modicon M580, M340, Quantum, and Premium controllers. An attacker can exploit this weakness, categorized as an Improper Check for Unusual or Exceptional Conditions (CWE-754), by writing to specific physical memory blocks via Modbus TCP. With a CVSS score of 7.5 (HIGH), this vulnerability is network-exploitable with low attack complexity and no user interaction required, leading to a complete loss of availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2.80CPE matchmatch criteria | cpe:2.3:o:schneider-electric:modicon_m580_firmware:*:*:*:*:*:*:*:* | ||
< 3.01CPE matchmatch criteria | cpe:2.3:o:schneider-electric:modicon_m340_firmware:*:*:*:*:*:*:*:* | ||
< 3.20CPE matchmatch criteria | cpe:2.3:o:schneider-electric:tsxh5744m_firmware:*:*:*:*:*:*:*:* | ||
< 3.20CPE matchmatch criteria | cpe:2.3:o:schneider-electric:tsxh5724m_firmware:*:*:*:*:*:*:*:* | ||
< 3.20CPE matchmatch criteria | cpe:2.3:o:schneider-electric:tsxp576634m_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.