# CVE-2020-7534: Cross-site request forgery in Modicon M340 CPUs: BMXP34 (All Versions), Modicon Quantum CPUs with integrated Ethernet (Copro): 140CPU65 (All Versions), Modicon Premium CPUs with integrated Ethernet (Copro): TSXP57 (All Versions), Modicon M340 ethernet modules: (BMXNOC0401, BMXNOE01, BMXNOR0200H) (All Versions), Modicon Quantum and Premium factory cast communication modules: (140NOE77111, 140NOC78*00, TSXETY5103, TSXETY4103) > A CSRF vulnerability in Modicon PLC web servers allows attackers to leak sensitive data or perform unauthorized actions while a user is logged in. - **Severity:** High 7.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** A user has to click or open something - **Fix available:** No - **Published:** 4 Feb 2022 - **Updated:** 28 May 2026 - **Also known as:** GHSA-5g6x-5wq6-p6g5 ## What is CVE-2020-7534? CVE-2020-7534 is a high-severity vulnerability in Modicon M340 CPUs: BMXP34 (All Versions), Modicon Quantum CPUs with integrated Ethernet (Copro): 140CPU65 (All Versions), Modicon Premium CPUs with integrated Ethernet (Copro): TSXP57 (All Versions), Modicon M340 ethernet modules: (BMXNOC0401, BMXNOE01, BMXNOR0200H) (All Versions), Modicon Quantum and Premium factory cast communication modules: (140NOE77111, 140NOC78*00, TSXETY5103, TSXETY4103), published on 4 Feb 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. ### Official description A CWE-352: Cross-Site Request Forgery (CSRF) vulnerability exists on the web server used, that could cause a leak of sensitive data or unauthorized actions on the web server during the time the user is logged in. Affected Products: Modicon M340 CPUs: BMXP34 (All Versions), Modicon Quantum CPUs with integrated Ethernet (Copro): 140CPU65 (All Versions), Modicon Premium CPUs with integrated Ethernet (Copro): TSXP57 (All Versions), Modicon M340 ethernet modules: (BMXNOC0401, BMXNOE01, BMXNOR0200H) (All Versions), Modicon Quantum and Premium factory cast communication modules: (140NOE77111, 140NOC78*00, TSXETY5103, TSXETY4103) (All Versions) Weakness: CWE-352 (Cross-Site Request Forgery) ## Which versions are affected by CVE-2020-7534? It affects 10 products. Products: Schneider-Electric 140cpu65 Firmware, Schneider-Electric 140noc78000 Firmware, Schneider-Electric 140noe77111 Firmware, Schneider-Electric Bmxnoc0401 Firmware, Schneider-Electric Bmxnoe01 Firmware, Schneider-Electric Bmxnor0200h Firmware, Schneider-Electric Modicon M340 Bmxp342020 Firmware, Schneider-Electric Tsxety4103 Firmware, Schneider-Electric Tsxety5103 Firmware, Schneider-Electric Tsxp57 Firmware. ## How do I fix CVE-2020-7534? No fix has been published for CVE-2020-7534 yet. Limit exposure of the affected software until one is available. ## Is CVE-2020-7534 being exploited? There is no known exploitation of CVE-2020-7534 in the wild and no public exploit code. ## Other vulnerabilities in Modicon M340 CPUs: BMXP34 (All Versions), Modicon Quantum CPUs with integrated Ethernet (Copro): 140CPU65 (All Versions), Modicon Premium CPUs with integrated Ethernet (Copro): TSXP57 (All Versions), Modicon M340 ethernet modules: (BMXNOC0401, BMXNOE01, BMXNOR0200H) (All Versions), Modicon Quantum and Premium factory cast communication modules: (140NOE77111, 140NOC78*00, TSXETY5103, TSXETY4103) - [CVE-2023-25620](https://insights.sbomify.com/CVE-2023-25620/): Denial of service in Legacy Modicon Premium CPUs (TSXP57*) (medium 6.5) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2020-7534 and fix it if it is affected. What it is: CVE-2020-7534 is a high-severity vulnerability in Modicon M340 CPUs: BMXP34 (All Versions), Modicon Quantum CPUs with integrated Ethernet (Copro): 140CPU65 (All Versions), Modicon Premium CPUs with integrated Ethernet (Copro): TSXP57 (All Versions), Modicon M340 ethernet modules: (BMXNOC0401, BMXNOE01, BMXNOR0200H) (All Versions), Modicon Quantum and Premium factory cast communication modules: (140NOE77111, 140NOC78*00, TSXETY5103, TSXETY4103), published on 4 Feb 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. Exploitation: There is no known exploitation of CVE-2020-7534 in the wild and no public exploit code. Affected product: Modicon M340 CPUs: BMXP34 (All Versions), Modicon Quantum CPUs with integrated Ethernet (Copro): 140CPU65 (All Versions), Modicon Premium CPUs with integrated Ethernet (Copro): TSXP57 (All Versions), Modicon M340 ethernet modules: (BMXNOC0401, BMXNOE01, BMXNOR0200H) (All Versions), Modicon Quantum and Premium factory cast communication modules: (140NOE77111, 140NOC78*00, TSXETY5103, TSXETY4103). No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2020-7534/ (Markdown: https://insights.sbomify.com/CVE-2020-7534/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7534 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7534 - OSV: https://osv.dev/vulnerability/CVE-2020-7534 --- From sbomify Insights: https://insights.sbomify.com/CVE-2020-7534/ Summaries are generated and may contain mistakes; the official description above is the record.