# What is CVE-2022-43716?

> CVE-2022-43716 is a high-severity flaw (CVSS 7.5) in Simatic Cp 1242-7 V2 from Siemens, published on 11 April 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 1.0%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2022-43716

## 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:** 47 out of 100 (Medium); action: Plan remediation. Kept up to date as the evidence changes.
- **Severity:** High (CVSS 7.5 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:** 1.0% (latest exploit-likelihood forecast)
- **Published:** 11 April 2023
- **Record last updated:** 10 September 2024
- **Main product:** Simatic Cp 1242-7 V2 from Siemens
- **Affected products:** 48

## What is CVE-2022-43716? In plain terms

It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can take it offline.

### The official description

A vulnerability has been identified in SIMATIC CP 1242-7 V2 (6GK7242-7KX31-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-1 (6GK7243-1BX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants) (All versions < V3.4.29), SIMATIC CP 1243-1 IEC (incl. SIPLUS variants) (All versions < V3.4.29), SIMATIC CP 1243-7 LTE EU (6GK7243-7KX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-7 LTE US (6GK7243-7SX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0) (All versions < V2.3), SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) (All versions < V2.3), SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) (All versions < V2.3), SIMATIC CP 443-1 (6GK7443-1EX30-0XE0) (All versions < V3.3), SIMATIC CP 443-1 (6GK7443-1EX30-0XE1) (All versions < V3.3), SIMATIC CP 443-1 Advanced (6GK7443-1GX30-0XE0) (All versions < V3.3), SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) (All versions < V2.3), SIPLUS NET CP 1242-7 V2 (6AG1242-7KX31-7XE0) (All versions < V3.4.29), SIPLUS NET CP 443-1 (6AG1443-1EX30-4XE0) (All versions < V3.3), SIPLUS NET CP 443-1 Advanced (6AG1443-1GX30-4XE0) (All versions < V3.3), SIPLUS S7-1200 CP 1243-1 (6AG1243-1BX30-2AX0) (All versions < V3.4.29), SIPLUS S7-1200 CP 1243-1 RAIL (6AG2243-1BX30-1XE0) (All versions < V3.4.29), SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) (All versions < V2.3.6), TIM 1531 IRC (6GK7543-1MX00-0XE0) (All versions < V2.3.6). The webserver of the affected products contains a vulnerability that may lead to a denial of service condition. An attacker may cause a denial of service situation which leads to a restart of the webserver of the affected product.

### What kind of flaw is it?

- CWE-416: Use After Free

### 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: No login needed
- Does someone have to click: No, nobody has to do anything
- What an attacker gets: Can take it offline

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

## Is CVE-2022-43716 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 1.0%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 1.0%, 1.0%, 1.0%, 1.0%, 1.0%, 1.0%, 1.0%.

### Timeline

- 11 April 2023: Published
- 10 September 2024: Record last updated

### How Precursor Intelligence ranks it

CVE-2022-43716 scores **47 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-2022-43716?

The published record lists 48 products. Versions are as published: "before 3.3" means every version up to, but not including, 3.3.

- [Simatic Cp 1242-7 V2](https://www.precursorintelligence.com/product/siemens/simatic_cp_1242-7_v2) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Cp 1242-7 V2 Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1242-7_v2_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Cp 1243-1](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-1) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Cp 1243-1 Dnp3](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-1_dnp3) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Cp 1243-1 Dnp3 Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-1_dnp3_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Cp 1243-1 Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-1_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Cp 1243-1 Iec](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-1_iec) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Cp 1243-1 Iec Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-1_iec_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Cp 1243-7 Lte Eu](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-7_lte_eu) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Cp 1243-7 Lte Eu Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-7_lte_eu_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Cp 1243-7 Lte Us](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-7_lte_us) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Cp 1243-7 Lte Us Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-7_lte_us_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Cp 1243-8 Irc](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-8_irc) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Cp 1243-8 Irc Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-8_irc_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Cp 1542sp-1](https://www.precursorintelligence.com/product/siemens/simatic_cp_1542sp-1) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Cp 1542sp-1 Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1542sp-1_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Cp 1542sp-1 Irc](https://www.precursorintelligence.com/product/siemens/simatic_cp_1542sp-1_irc) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Cp 1542sp-1 Irc Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1542sp-1_irc_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Cp 1543sp-1](https://www.precursorintelligence.com/product/siemens/simatic_cp_1543sp-1) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Cp 1543sp-1 Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1543sp-1_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Cp 443-1](https://www.precursorintelligence.com/product/siemens/simatic_cp_443-1) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Cp 443-1 Advanced](https://www.precursorintelligence.com/product/siemens/simatic_cp_443-1_advanced) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Cp 443-1 Advanced Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_443-1_advanced_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.3
- [Simatic Cp 443-1 Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_443-1_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.3
- [Simatic IPC Diagbase](https://www.precursorintelligence.com/product/siemens/simatic_ipc_diagbase) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic IPC Diagbase Firmware](https://www.precursorintelligence.com/product/siemens/simatic_ipc_diagbase_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic IPC Diagmonitor](https://www.precursorintelligence.com/product/siemens/simatic_ipc_diagmonitor) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic IPC Diagmonitor Firmware](https://www.precursorintelligence.com/product/siemens/simatic_ipc_diagmonitor_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Siplus Et 200sp Cp 1542sp-1 Irc Tx Rail](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cp_1542sp-1_irc_tx_rail) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Siplus Et 200sp Cp 1542sp-1 Irc Tx Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cp_1542sp-1_irc_tx_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Siplus Et 200sp Cp 1543sp-1 Isec](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cp_1543sp-1_isec) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Siplus Et 200sp Cp 1543sp-1 Isec Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cp_1543sp-1_isec_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Siplus Et 200sp Cp 1543sp-1 Isec Tx Rail](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cp_1543sp-1_isec_tx_rail) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Siplus Et 200sp Cp 1543sp-1 Isec Tx Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cp_1543sp-1_isec_tx_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Siplus Net Cp 1242-7 V2](https://www.precursorintelligence.com/product/siemens/siplus_net_cp_1242-7_v2) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Siplus Net Cp 1242-7 V2 Firmware](https://www.precursorintelligence.com/product/siemens/siplus_net_cp_1242-7_v2_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Siplus Net Cp 443-1](https://www.precursorintelligence.com/product/siemens/siplus_net_cp_443-1) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Siplus Net Cp 443-1 Advanced](https://www.precursorintelligence.com/product/siemens/siplus_net_cp_443-1_advanced) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Siplus Net Cp 443-1 Advanced Firmware](https://www.precursorintelligence.com/product/siemens/siplus_net_cp_443-1_advanced_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.3
- [Siplus Net Cp 443-1 Firmware](https://www.precursorintelligence.com/product/siemens/siplus_net_cp_443-1_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.3
- [Siplus S7-1200 Cp 1243-1](https://www.precursorintelligence.com/product/siemens/siplus_s7-1200_cp_1243-1) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Siplus S7-1200 Cp 1243-1 Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1200_cp_1243-1_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Siplus S7-1200 Cp 1243-1 Rail](https://www.precursorintelligence.com/product/siemens/siplus_s7-1200_cp_1243-1_rail) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Siplus S7-1200 Cp 1243-1 Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1200_cp_1243-1_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Siplus Tim 1531 Irc](https://www.precursorintelligence.com/product/siemens/siplus_tim_1531_irc) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Siplus Tim 1531 Irc Firmware](https://www.precursorintelligence.com/product/siemens/siplus_tim_1531_irc_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.3.6
- [Tim 1531 Irc](https://www.precursorintelligence.com/product/siemens/tim_1531_irc) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Tim 1531 Irc Firmware](https://www.precursorintelligence.com/product/siemens/tim_1531_irc_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 2.3.6

## How do I fix CVE-2022-43716?

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

- [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/pdf/ssa-566905.pdf) (Vendor advisory)
- [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/html/ssa-139628.html)
- [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/html/ssa-566905.html)

## Questions

### What is CVE-2022-43716?

CVE-2022-43716 is a high-severity flaw in Simatic Cp 1242-7 V2 from Siemens, published on 11 April 2023. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can take it offline.

### How serious is CVE-2022-43716?

It scores 7.5 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2022-43716 is 47 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-2022-43716 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 1.0%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2022-43716 affect?

For Simatic Cp 1242-7 V2 from Siemens: version not specified. The record lists 48 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2022-43716?

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-2022-43716 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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