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No exploitation reported

CVE-2017-7574

No exploitation reported by the sources we read.

  • Published2017-04-06
  • WeaknessCWE-321 · CWE-798

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Schneider Electric SoMachine Basic 1.4 SP1 and Schneider Electric Modicon TM221CE16R 1.3.3.3 devices have a hardcoded-key vulnerability. The Project Protection feature is used to prevent unauthorized users from opening an XML protected project file, by prompting the user for a password. This XML file is AES-CBC encrypted; however, the key used for encryption (SoMachineBasicSoMachineBasicSoMa) cannot be changed. After decrypting the XML file with this key, the user password can be found in the decrypted data. After reading the user password, the project can be opened and modified with the Schneider product.

Timeline

dates in UTC
  1. 2017-04-0621:59CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-7574?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-7574?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Schneider-electric modicon tm221ce16r firmwareversion to verify
BranchAffectedFixed in
1.3= 1.3.3.3no fix published
Schneider-electric somachine
BranchAffectedFixed in
1.4= 1.4no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-17-103-02A CISA2 known affected

    Schneider Electric Modicon M221 PLCs and SoMachine Basic (Update A)

    All Modicon M221 PLCs with: firmware version up to v1.5.0.1 and associated SoMachine Basic software (up to v1.5) · SoMachine Basic: > 1.5

Full record on NVD

Fix

  1. Mitigation from the vendor CISA ICSA-17-103-02A · 2 productsSchneider Electric recommends that users store project files in secure, access-restricted locations and encrypt project files with reputable third party file encryption tools.
  2. Mitigation from the vendor CISA ICSA-17-103-02A · 2 productsOn June 14, 2017, Schneider Electric released firmware v1.5.1.0 and associated SoMachineBasic V1.5SP1. The new version uses an enhanced encryption mechanism and prevents M221 from returning the password. Users may download SoMachineBasic V1.5SP1 (including firmware v1.5.1.0) from the Schneider Elec…
  3. Mitigation from the vendor CISA ICSA-17-103-02A · 2 productsSchneider Electric's security notice SEVD-2017-097-01 is available at the following location:
  4. Mitigation from the vendor CISA ICSA-17-103-02A · 2 productsSchneider Electric's security notice SEVD-2017-097-02 is available at the following location:

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2026-05-29
  • OpenCVESSVC decisionnone—
  • CISA-ADPCVSS 3.1102026-05-29
  • NVDCVSS 3.19.8read 2026-10-23
  • NVDCVSS 2.07.5read 2026-10-23
  • CISA-ADPweakness (CWE)CWE-3212026-05-29
  • NVDweakness (CWE)CWE-798read 2026-10-23
  • FIRST EPSSEPSS score1.3 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2017-04-06
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2017-7574?

Schneider Electric SoMachine Basic 1.4 SP1 and Schneider Electric Modicon TM221CE16R 1.3.3.3 devices have a hardcoded-key vulnerability. The Project Protection feature is used to prevent unauthorized users from opening an XML protected project file, by prompting the user for a password. This XML file is AES-CBC encrypted; however, the key used for encryption (SoMachineBasicSoMachineBasicSoMa) cannot be changed. After decrypting the XML file with this key, the user password can be found in the decrypted data. After reading the user password, the project can be opened and modified with the Schneider product.

Is CVE-2017-7574 actively exploited?

Active exploitation of CVE-2017-7574 has not been confirmed. Its EPSS score was 1.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-7574?

CVE-2017-7574 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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