CVE-2026-102693

Status: DeferredCritical (9.6)—

Severity9.6Critical · CVSS 3.1

Exploitation probability0.23 %higher than 12% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitNot knownno public code found

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

Base score: 9.6
Version: 3.1
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.23 %
Percentile among all scored CVEs: 12
Score date: 10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1210 Exploitation of Remote Serviceslateral movement85 %
Primary impactT1499 Endpoint Denial of Serviceimpact90 %
Secondary impactT1059 Command and Scripting Interpreterexecution35 %

Vector AV:A, PR:N, UI:N: atacante adyacente sin privilegios; strcpy sin control de tamaño en el SSID causa corrupción de memoria, DoS o posible ejecución de código.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

ATT&CK mitigations that cover these techniques

Privileged Account Management Disable or Remove Feature or Program Vulnerability Scanning Threat Intelligence Program Restrict Web-Based Content Network Segmentation

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Riot-os — Riot^AI

CWEs

CWE-120, CWE-121

References

Show 3 references

Raw JSON (NVD)

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{
  "id": "CVE-2026-102693",
  "cveTags": [],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-102693",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-16T19:22:51.330478Z"
        }
      }
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    "cvssMetricV31": [
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        "source": "security-advisories@github.com",
        "cvssData": {
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          "version": "3.1",
          "baseScore": 9.6,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 2.8
      }
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  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "RIOT-OS",
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          "versions": [
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              "version": "< 2026.04"
            }
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  "published": "2026-10-16T17:17:17.173",
  "references": [
    {
      "url": "https://github.com/RIOT-OS/RIOT/commit/5209c1b84f9771342f079b7d5d94d8207fdd5f0a",
      "source": "security-advisories@github.com"
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    }
  ],
  "lastModified": "2026-10-16T20:17:17.397",
  "sourceIdentifier": "security-advisories@github.com"
}