# CVE-2022-37300: Auth bypass in EcoStruxure Control Expert > Weak password recovery allows unauthorized read and write access to Modicon PLCs and EcoStruxure controllers via Modbus. - **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** No - **Published:** 12 Sep 2022 - **Updated:** 3 Aug 2024 - **Also known as:** GHSA-w47m-6qcr-7xg2 ## What is CVE-2022-37300? CVE-2022-37300 is a critical authentication bypass vulnerability in Schneider Electric EcoStruxure Control Expert, published on 12 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description A CWE-640: Weak Password Recovery Mechanism for Forgotten Password vulnerability exists that could cause unauthorized access in read and write mode to the controller when communicating over Modbus. Affected Products: EcoStruxure Control Expert Including all Unity Pro versions (former name of EcoStruxure Control Expert) (V15.0 SP1 and prior), EcoStruxure Process Expert, Including all versions of EcoStruxure Hybrid DCS (former name of EcoStruxure Process Expert) (V2021 and prior), Modicon M340 CPU (part numbers BMXP34*) (V3.40 and prior), Modicon M580 CPU (part numbers BMEP* and BMEH*) (V3.20 and prior). Weakness: CWE-640 (Weak Password Recovery Mechanism for Forgotten Password) ## Which versions are affected by CVE-2022-37300? It affects 36 products. Products: Schneider-Electric Ecostruxure Control Expert, Schneider-Electric Ecostruxure Process Expert, Schneider-Electric Modicon M340 Bmxp341000 Firmware, Schneider-Electric Modicon M340 Bmxp342000 Firmware, Schneider-Electric Modicon M340 Bmxp3420102 Firmware, Schneider-Electric Modicon M340 Bmxp342010 Firmware, Schneider-Electric Modicon M340 Bmxp342020 Firmware, Schneider-Electric Modicon M340 Bmxp342020h Firmware, Schneider-Electric Modicon M340 Bmxp3420302 Firmware, Schneider-Electric Modicon M340 Bmxp3420302h Firmware, Schneider-Electric Modicon M340 Bmxp342030 Firmware, Schneider-Electric Modicon M340 Bmxp342030h Firmware, Schneider-Electric Modicon M580 Bmeh582040 Firmware, Schneider-Electric Modicon M580 Bmeh582040c Firmware, Schneider-Electric Modicon M580 Bmeh582040s Firmware, Schneider-Electric Modicon M580 Bmeh584040 Firmware, Schneider-Electric Modicon M580 Bmeh584040c Firmware, Schneider-Electric Modicon M580 Bmeh584040s Firmware, Schneider-Electric Modicon M580 Bmeh586040 Firmware, Schneider-Electric Modicon M580 Bmeh586040c Firmware and 16 more. ## How do I fix CVE-2022-37300? No fix has been published for CVE-2022-37300 yet. Limit exposure of the affected software until one is available. ## Is CVE-2022-37300 being exploited? There is no known exploitation of CVE-2022-37300 in the wild and no public exploit code. ## Other vulnerabilities in Schneider Electric EcoStruxure Control Expert - [CVE-2020-28212](https://insights.sbomify.com/CVE-2020-28212/): Auth bypass in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) (critical 9.8) - [CVE-2020-7475](https://insights.sbomify.com/CVE-2020-7475/): Code injection in EcoStruxure Control Expert (all versions prior to 14.1 Hot Fix), Unity Pro (all versions), Modicon M340 (all versions prior to V3.20), Modicon M580 (all versions prior to V3.10) (critical 9.8) - [CVE-2023-27976](https://insights.sbomify.com/CVE-2023-27976/): Other in EcoStruxure Control Expert (high 8.8) - [CVE-2020-28213](https://insights.sbomify.com/CVE-2020-28213/): Code injection in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) (high 8.8) - [CVE-2020-7560](https://insights.sbomify.com/CVE-2020-7560/): Memory corruption in EcoStruxure™ Control Expert (all versions) and Unity Pro (former name of EcoStruxure™ Control Expert) (all versions) (high 8.6) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2022-37300 and fix it if it is affected. What it is: CVE-2022-37300 is a critical authentication bypass vulnerability in Schneider Electric EcoStruxure Control Expert, published on 12 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2022-37300 in the wild and no public exploit code. Affected product: Schneider Electric EcoStruxure Control Expert. 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-2022-37300/ (Markdown: https://insights.sbomify.com/CVE-2022-37300/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2022-37300 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-37300 - OSV: https://osv.dev/vulnerability/CVE-2022-37300 --- From sbomify Insights: https://insights.sbomify.com/CVE-2022-37300/ Summaries are generated and may contain mistakes; the official description above is the record.