Critical severity · published Oct 16, 2026
CVE-2026-102693
RIOT: Remote Stack Buffer Overflow in ATWINC15x0 driver via unsanitized SSID
9.6
CVSS
0.2%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RI
RIOT · RIOT-OS
< 2026.04 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102693
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-102693
github.com
https://github.com/RIOT-OS/RIOT/commit/5209c1b84f9771342f079b7d5d94d8207fdd5f0a
github.com
https://github.com/RIOT-OS/RIOT/releases/tag/2026.04
github.com
https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-gwgv-6976-hxrg
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