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CVE-2018-7790
An Information Management Error vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to…
Critical9.8EPSS 2.4%
- Published
- Updated
- Reserved
- Assigned by
- schneider
Description
An Information Management Error 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 replay authentication sequences. If an attacker exploits this vulnerability and connects to a Modicon M221, the attacker can upload the original program from the PLC.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 2.4% · top 16% of all CVEs (4 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
- Information Management Error
- CWE-294 Authentication Bypass by Capture-replay (opens in a new tab)All about CWE-294 and its CVEs
Affected products
Schneider Electric SE · Modicon M221, all references, all versions prior to firmware V1.6.2.0
- affected Modicon M221, all references, all versions prior to firmware V1.6.2.0
References (2)
- 105182 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://www.schneider-electric.com/en/download/document/SEVD-2018-235-01/ (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2018-7790)Record last updated .