Critical 9.6Published Oct 16, 2026

CVE-2026-102693RIOT: Remote Stack Buffer Overflow in ATWINC15x0 driver via unsanitized SSID

Updated under an hour ago (2026-10-19 04:50 UTC)

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It affects RIOT-OS RIOT. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for RIOT-OS RIOT

Exploited in the last 30 days

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.04, the ATWINC15x0 driver's _atwinc15x0_sta_set_current_ssid function uses strcpy to copy an SSID without checking the destination size. When MODULE_ATWINC15X0_DYNAMIC_CONNECT is enabled, a nearby attacker can advertise a malformed or oversized SSID that is processed during Wi-Fi scanning, causing memory corruption and potentially a hard fault, denial of service, or code execution. This issue is fixed in version 2026.04.

CVSS: 9.6 CRITICAL (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-120, CWE-121
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 16, 2026

Affected products

Affected products

RIOT-OS RIOT riot_os:riot (from the name)	before 2026.04	CNA record

References

https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-gwgv-6976-hxrgx-refsource-confirm
https://github.com/RIOT-OS/RIOT/commit/5209c1b84f9771342f079b7d5d94d8207fdd5f0ax-refsource-misc
https://github.com/RIOT-OS/RIOT/releases/tag/2026.04x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.