How severe is CVE-2023-28391?

CVE-2023-28391 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-28391 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-28391?

CVE-2023-28391 primarily affects Silabs Gecko Software Development Kit. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-28391?

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

When was CVE-2023-28391 published?

CVE-2023-28391 was published on 2023-11-14 and last updated on 2026-06-17.

CVE-2023-28391

CVE-2023-28391 is a critical-severity vulnerability in Silabs Gecko Software Development Kit with a CVSS 3.x base score of 9.0. 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-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Silabs Gecko Software Development Kit
Published: 2023-11-14
Last modified: 2026-06-17

Description

A memory corruption vulnerability exists in the HTTP Server header parsing functionality of Weston Embedded uC-HTTP v3.01.01. Specially crafted network packets can lead to code execution. An attacker can send a malicious packet to trigger this vulnerability.

Frequently asked questions

What is CVE-2023-28391?: A memory corruption vulnerability exists in the HTTP Server header parsing functionality of Weston Embedded uC-HTTP v3.01.01. Specially crafted network packets can lead to code execution. An attacker can send a malicious packet to trigger this vulnerability.
How severe is CVE-2023-28391?: CVE-2023-28391 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-28391 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-28391?: CVE-2023-28391 primarily affects Silabs Gecko Software Development Kit. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-28391?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-28391 published?: CVE-2023-28391 was published on 2023-11-14 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:silabs:gecko_software_development_kit:4.3.1:*:*:*:*:*:*:*
cpe:2.3:a:weston-embedded:cesium_net:3.07.01:*:*:*:*:*:*:*
cpe:2.3:a:weston-embedded:uc-http:3.01.01:*:*:*:*:*:*:*

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