What is CVE-2025-2837?

CVE-2025-2837 is a high-severity vulnerability in Silabs Gecko OS, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2025-03-26.

How severe is CVE-2025-2837?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Silabs Gecko OS

CVE-2025-2837

Silicon Labs Gecko OS HTTP Request Handling Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Silicon Labs Gecko OS. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of HTTP requests. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-23245.

Vulnerability class: Buffer Overflow

EPSS: 0.005 (38.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Silabs Gecko_os — versions 1.0.46
Silicon Labs Gecko Os — versions 1.0.46

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

zdi-disclosures@trendmicro.com (x_research-advisory, Third Party Advisory)
zdi-disclosures@trendmicro.com (Permissions Required, vendor-advisory)

Frequently asked questions

What is CVE-2025-2837?: CVE-2025-2837 is a high-severity vulnerability in Silabs Gecko OS, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2025-03-26.
How severe is CVE-2025-2837?: High severity. CVSS v3 base score is 8.8 out of 10.