CVE•Published 2018-08-29•Modified 2026-05-29•1 article on news•5 live references•NVD data
CVE-2018-7791Schneider-electric · Modicon_m221_firmware
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
58
Exploit Prediction Scoring System · top 42% of all CVEs
Weaknesses (CWE)
Description
A Permissions, Privileges, and Access Control vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0). The vulnerability allows unauthorized users to overwrite the original password with their password. If an attacker exploits this vulnerability and overwrite the password, the attacker can upload the original program from the PLC.
Timeline
Published 2018-08-29
Modified 2026-05-29
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2018-7791Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Modicon M221 Firmware"Hosts Shodan identified as running Modicon M221 Firmware.
More intel sources (5)
Shodan report
vuln:CVE-2018-7791Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2018-7791Censys host search filtered to this CVE id.
grep.app
CVE-2018-7791Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2018-7791GitHub code search for direct mentions.
Google dork
"CVE-2018-7791" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2018-7791 on GitHub.