Vulnerability · Published Nov 19, 2025 · Assigned by Nozomi

CVE-2025-11243Allocation of Resources Without Limits or Throttling in Shelly Pro 4PM

High 8.3

In plain English

A high-severity resource allocation without limits in Pro 4PM from Shelly. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 4.0)8.3High

Exploit odds (30 days)0.4%top 63.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Allocation of Resources Without Limits or Throttling vulnerability in Shelly Pro 4PM (before v1.6) allows Excessive Allocation via network.

Affected products (as reported)

Vendor	Product	Versions
Shelly	Pro 4PM	0 – before 1.6

Weakness: CWE-770 · Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

References

https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11243 third-party-advisory
https://www.nozominetworks.com/blog/shelly-pro-4pm-vulnerabilities media-coverage, technical-description
https://www.cisa.gov/news-events/ics-advisories/icsa-25-322-02 government-resource, technical-description