by Kastro
Paper/Archive/CVE-2026-102693

CVE-2026-102693

RIOT-OS RIOT — RIOT: Remote Stack Buffer Overflow in ATWINC15x0 driver via unsanitized SSID

EPSS 0.2%CVSS 9.6
critical.is priorityof 100
32
CVSS 9.6 (CNA)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 13.3.133 × 202.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
RIOT< 2026.04–CNA

Scores by source

GitHub_M (CNA)9.6CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/RIOT-OS/RIOT/security/advisories/GHSA-gwgv-6976-hxrgrefgithub.com/RIOT-OS/RIOT/commit/5209c1b84f9771342f079b7d5d94d8207fdd5f0arefgithub.com/RIOT-OS/RIOT/releases/tag/2026.04