How severe is CVE-2025-2837?

CVE-2025-2837 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-2837 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-2837?

CVE-2025-2837 affects Silabs Gecko Os. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-2837?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-2837 have an EU (EUVD) identifier?

Yes. CVE-2025-2837 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8258.

When was CVE-2025-2837 published?

CVE-2025-2837 was published on 2025-03-26 and last updated on 2026-06-17.

CVE-2025-2837

CVE-2025-2837 is a high-severity vulnerability in Silabs Gecko Os with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-121.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-8258
Weakness: CWE-121
Affected product: Silabs Gecko Os
Published: 2025-03-26
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-2837?: CVE-2025-2837 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-2837 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-2837?: CVE-2025-2837 affects Silabs Gecko Os. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-2837?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-2837 have an EU (EUVD) identifier?: Yes. CVE-2025-2837 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8258.
When was CVE-2025-2837 published?: CVE-2025-2837 was published on 2025-03-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:silabs:gecko_os:1.0.46:*:*:*:*:*:*:*

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