# What is CVE-2020-7563?

> CVE-2020-7563 is a high-severity flaw (CVSS 8.8) in Modicon Tsxety4103 Firmware from Schneider-Electric, published on 18 November 2020. 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 1.1%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2020-7563

## 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:** 48 out of 100 (Medium); action: Plan remediation. Kept up to date as the evidence changes.
- **Severity:** High (CVSS 8.8 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:** 1.1% (latest exploit-likelihood forecast)
- **Published:** 18 November 2020
- **Record last updated:** 2 December 2020
- **Main product:** Modicon Tsxety4103 Firmware from Schneider-Electric
- **Affected products:** 40

## What is CVE-2020-7563? In plain terms

It can be attacked from anywhere on the internet with an ordinary user account, and nobody has to click anything. If it works, the attacker can read data, change data and take it offline.

### The official description

A CWE-787: Out-of-bounds Write vulnerability exists in the Web Server on Modicon M340, Modicon Quantum and Modicon Premium Legacy offers and their Communication Modules (see notification for details) which could cause corruption of data, a crash, or code execution when uploading a specially crafted file on the controller over FTP.

### What kind of flaw is it?

- CWE-787: Out-of-bounds Write

### 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 ordinary user account
- Does someone have to click: No, nobody has to do anything
- What an attacker gets: Can read data, change data and take it offline

Severity vector: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

## Is CVE-2020-7563 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 1.1%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 1.1%, 1.1%, 1.1%, 1.1%, 1.1%, 1.1%, 1.1%.

### Timeline

- 18 November 2020: Published
- 2 December 2020: Record last updated

### How Precursor Intelligence ranks it

CVE-2020-7563 scores **48 out of 100 (Medium)**, with the action "Plan remediation".

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-2020-7563?

The published record lists 40 products.

- [Modicon Tsxety4103 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_tsxety4103_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon M340 Bmx Noc 0401](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_noc_0401) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon M340 Bmx Noc 0401 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_noc_0401_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon M340 Bmx Noe 0100](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_noe_0100) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon M340 Bmx Noe 0100 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_noe_0100_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon M340 Bmx Noe 0100h](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_noe_0100h) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon M340 Bmx Noe 0100h Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_noe_0100h_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon M340 Bmx Noe 0110](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_noe_0110) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon M340 Bmx Noe 0110 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_noe_0110_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon M340 Bmx Noe 0110h](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_noe_0110h) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon M340 Bmx Noe 0110h Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_noe_0110h_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon M340 Bmx Nor 0200h](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_nor_0200h) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon M340 Bmx Nor 0200h Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_nor_0200h_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon M340 Bmx P34-2010](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_p34-2010) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon M340 Bmx P34-2010 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_p34-2010_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon M340 Bmx P34-2030](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_p34-2030) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon M340 Bmx P34-2030 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m340_bmx_p34-2030_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon Quantum 140cpu65150](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140cpu65150) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon Quantum 140cpu65150 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140cpu65150_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon Quantum 140cpu65150c](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140cpu65150c) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon Quantum 140cpu65150c Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140cpu65150c_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon Quantum 140cpu65160](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140cpu65160) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon Quantum 140cpu65160 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140cpu65160_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon Quantum 140cpu65160c](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140cpu65160c) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon Quantum 140cpu65160c Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140cpu65160c_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon Quantum 140noc78100](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140noc78100) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon Quantum 140noc78100 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140noc78100_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon Quantum 140noe77101](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140noe77101) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon Quantum 140noe77101 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140noe77101_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon Quantum 140noe77111](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140noe77111) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon Quantum 140noe77111 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_quantum_140noe77111_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon Tsxety4103](https://www.precursorintelligence.com/product/schneider-electric/modicon_tsxety4103) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon Tsxety5103](https://www.precursorintelligence.com/product/schneider-electric/modicon_tsxety5103) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon Tsxety5103 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_tsxety5103_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon Tsxp574634](https://www.precursorintelligence.com/product/schneider-electric/modicon_tsxp574634) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon Tsxp574634 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_tsxp574634_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon Tsxp575634](https://www.precursorintelligence.com/product/schneider-electric/modicon_tsxp575634) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon Tsxp575634 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_tsxp575634_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions
- [Modicon Tsxp576634](https://www.precursorintelligence.com/product/schneider-electric/modicon_tsxp576634) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified
- [Modicon Tsxp576634 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_tsxp576634_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions

## How do I fix CVE-2020-7563?

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 update named in the vendor’s advisory. We’ve put the advisory first in the list.
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

- [se.com](https://www.se.com/ww/en/download/document/SEVD-2020-315-01/) (Vendor advisory)

## Questions

### What is CVE-2020-7563?

CVE-2020-7563 is a high-severity flaw in Modicon Tsxety4103 Firmware from Schneider-Electric, published on 18 November 2020. It can be attacked from anywhere on the internet with an ordinary user account, and nobody has to click anything. If it works, the attacker can read data, change data and take it offline.

### How serious is CVE-2020-7563?

It scores 8.8 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2020-7563 is 48 out of 100, which is Medium. Its action is "Plan remediation". No sign of exploitation and a low forecast. Patch it in your normal update cycle.

### Is CVE-2020-7563 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 1.1%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2020-7563 affect?

For Modicon Tsxety4103 Firmware from Schneider-Electric: all versions. The record lists 40 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2020-7563?

Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet.

## Does CVE-2020-7563 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.

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