# What is CVE-2023-4089? > CVE-2023-4089 is a low-severity flaw (CVSS 2.7) in Compact Controller 100 Firmware from Wago, published on 17 October 2023. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 0.6%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2023-4089 ## At a glance - **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle. - **Precursor Intelligence risk score:** 15 out of 100 (Info); action: Track. Kept up to date as the evidence changes. - **Severity:** Low (CVSS 2.7 out of 10) - **Known to be exploited:** No, not on the list of flaws known to be exploited today - **Chance of use in the next 30 days:** 0.6% (latest exploit-likelihood forecast) - **Published:** 17 October 2023 - **Record last updated:** 24 October 2023 - **Main product:** Compact Controller 100 Firmware from Wago - **Affected products:** 14 ## What is CVE-2023-4089? In plain terms It can be attacked from anywhere on the internet with an administrator account, and nobody has to click anything. If it works, the attacker can read some data. ### The official description On affected Wago products an remote attacker with administrative privileges can access files to which he has already access to through an undocumented local file inclusion. This access is logged in a different log file than expected. ### What kind of flaw is it? - CWE-610: Externally Controlled Reference to a Resource in Another Sphere ### How an attack on it works - Where an attacker can be: Anywhere on the internet - How hard it is to pull off: Easy: no special conditions - Login needed first: An administrator account - Does someone have to click: No, nobody has to do anything - What an attacker gets: Can read some data Severity vector: `CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N` ## Is CVE-2023-4089 being exploited? Not that we know of It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.6%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 0.5%, 0.5%, 0.5%, 0.5%, 0.5%, 0.5%, 0.6%. ### Timeline - 17 October 2023: Published - 24 October 2023: Record last updated ### How Precursor Intelligence ranks it CVE-2023-4089 scores **15 out of 100 (Info)**, with the action "Track". Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less: - Evidence it is being exploited: biggest factor - How severe it is: strong factor - How widely exposed it is: smaller factor - Threat activity around it: smaller factor 85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it. ## Who is affected by CVE-2023-4089? The published record lists 14 products. - [Compact Controller 100 Firmware](https://www.precursorintelligence.com/product/wago/compact_controller_100_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): 19 to 26 - [Compact Controller 100](https://www.precursorintelligence.com/product/wago/compact_controller_100) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [Edge Controller](https://www.precursorintelligence.com/product/wago/edge_controller) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [Edge Controller Firmware](https://www.precursorintelligence.com/product/wago/edge_controller_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): 18 to 26 - [Pfc100](https://www.precursorintelligence.com/product/wago/pfc100) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [Pfc100 Firmware](https://www.precursorintelligence.com/product/wago/pfc100_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): 16 to 26 - [Pfc200](https://www.precursorintelligence.com/product/wago/pfc200) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [Pfc200 Firmware](https://www.precursorintelligence.com/product/wago/pfc200_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): 16 to 26 - [Touch Panel 600 Advanced](https://www.precursorintelligence.com/product/wago/touch_panel_600_advanced) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [Touch Panel 600 Advanced Firmware](https://www.precursorintelligence.com/product/wago/touch_panel_600_advanced_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): 16 to 26 - [Touch Panel 600 Marine](https://www.precursorintelligence.com/product/wago/touch_panel_600_marine) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [Touch Panel 600 Marine Firmware](https://www.precursorintelligence.com/product/wago/touch_panel_600_marine_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): 16 to 26 - [Touch Panel 600 Standard](https://www.precursorintelligence.com/product/wago/touch_panel_600_standard) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Hardware): version not specified - [Touch Panel 600 Standard Firmware](https://www.precursorintelligence.com/product/wago/touch_panel_600_standard_firmware) by [Wago](https://www.precursorintelligence.com/vendors/wago) (Operating system): 16 to 26 ## How do I fix CVE-2023-4089? 1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list. 2. **Apply the vendor’s fix.** Install the latest update from the vendor. The references list where the vendor has published details. 3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in. 4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood. ### References - [cert.vde.com](https://cert.vde.com/en/advisories/VDE-2023-046/) (Third-party advisory) ## Questions ### What is CVE-2023-4089? CVE-2023-4089 is a low-severity flaw in Compact Controller 100 Firmware from Wago, published on 17 October 2023. It can be attacked from anywhere on the internet with an administrator account, and nobody has to click anything. If it works, the attacker can read some data. ### How serious is CVE-2023-4089? It scores 2.7 out of 10 on the CVSS severity scale, which is low. Our risk score for CVE-2023-4089 is 15 out of 100, which is Info. Its action is "Track". No sign of exploitation and a low forecast. Patch it in your normal update cycle. ### Is CVE-2023-4089 being exploited? It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.6%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2023-4089 affect? For Compact Controller 100 Firmware from Wago: 19 to 26. The record lists 14 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2023-4089? Install the update the vendor names in its advisory. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. ## Does CVE-2023-4089 affect you? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact