# Riot-Os RIOT vulnerabilities Source: https://junglewise.ai/threats/technologies/riot Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/riot.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 9 vulnerabilities in Riot-Os RIOT: 0 in the last 7 days and 5 in the last 90 days, 5 of them critical and 0 exploited in the wild. The most recent, CVE-2026-49868, was published on 16 October 2026. 2 vulnerabilities in the last four weeks, down 33% on the four before (3). 2 critical against 0. ## Counts - Last 7 days: 0 - Last 30 days: 2 - Last 90 days: 5 - All time: 9 (5 critical, 0 exploited in the wild) ## About Riot-Os RIOT RIOT is a small operating system for networked, memory-constrained systems with a focus on low-power wireless Internet of Things devices. ## Latest Riot-Os RIOT vulnerabilities - [CVE-2026-49868: RIOT DHCPv6 client out-of-bounds heap read](https://junglewise.ai/threats/cve-2026-49868-riot-is-an-open-source-microcontroller-operating-system-designed) (critical, CVSS 9.8, published 16 Oct 2026) - [CVE-2026-102692: RIOT nanocoap integer overflow in Block2 option parsing](https://junglewise.ai/threats/cve-2026-102692-riot-is-an-open-source-microcontroller-operating-system-designed) (critical, CVSS 9.1, published 16 Oct 2026) - [CVE-2026-107838: RIOT nanocoap_fileserver assertion failure in response handling](https://junglewise.ai/threats/cve-2026-107838-riot-is-an-open-source-microcontroller-operating-system-designed) (high, CVSS 7.5, published 9 Oct 2026) - [CVE-2026-107837: RIOT operating system out-of-bounds read in 6LoWPAN fragment handling](https://junglewise.ai/threats/cve-2026-107837-riot-is-an-open-source-microcontroller-operating-system-designed) (high, CVSS 8.2, published 9 Oct 2026) - [CVE-2026-107836: RIOT nanoCoAP client buffer underflow in blockwise transfer](https://junglewise.ai/threats/cve-2026-107836-riot-is-an-open-source-microcontroller-operating-system-designed) (info, published 9 Oct 2026) - [CVE-2026-22214: RIOT OS stack overflow in ethos serial frame parser](https://junglewise.ai/threats/cve-2026-22214-riot-os-stack-overflow-in-ethos-serial-frame-parser) (critical, CVSS 9.8, published 12 Jan 2026) - [CVE-2026-22213: RIOT OS stack-based buffer overflow in tapslip6 utility](https://junglewise.ai/threats/cve-2026-22213-riot-os-stack-based-buffer-overflow-in-tapslip6-utility) (critical, CVSS 9.8, published 12 Jan 2026) - [CVE-2025-66647: RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things…](https://junglewise.ai/threats/cve-2025-66647-riot-is-an-open-source-microcontroller-operating-system-designed) (critical, CVSS 9.8, published 17 Dec 2025) - [CVE-2025-66646: RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things…](https://junglewise.ai/threats/cve-2025-66646-riot-is-an-open-source-microcontroller-operating-system-designed) (high, CVSS 7.5, published 17 Dec 2025) ## Most severe Riot-Os RIOT vulnerabilities - [CVE-2025-66647: RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things…](https://junglewise.ai/threats/cve-2025-66647-riot-is-an-open-source-microcontroller-operating-system-designed) (critical, CVSS 9.8, published 17 Dec 2025) - [CVE-2026-22214: RIOT OS stack overflow in ethos serial frame parser](https://junglewise.ai/threats/cve-2026-22214-riot-os-stack-overflow-in-ethos-serial-frame-parser) (critical, CVSS 9.8, published 12 Jan 2026) - [CVE-2026-22213: RIOT OS stack-based buffer overflow in tapslip6 utility](https://junglewise.ai/threats/cve-2026-22213-riot-os-stack-based-buffer-overflow-in-tapslip6-utility) (critical, CVSS 9.8, published 12 Jan 2026) - [CVE-2026-49868: RIOT DHCPv6 client out-of-bounds heap read](https://junglewise.ai/threats/cve-2026-49868-riot-is-an-open-source-microcontroller-operating-system-designed) (critical, CVSS 9.8, published 16 Oct 2026) - [CVE-2026-102692: RIOT nanocoap integer overflow in Block2 option parsing](https://junglewise.ai/threats/cve-2026-102692-riot-is-an-open-source-microcontroller-operating-system-designed) (critical, CVSS 9.1, published 16 Oct 2026) - [CVE-2026-107837: RIOT operating system out-of-bounds read in 6LoWPAN fragment handling](https://junglewise.ai/threats/cve-2026-107837-riot-is-an-open-source-microcontroller-operating-system-designed) (high, CVSS 8.2, published 9 Oct 2026) - [CVE-2025-66646: RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things…](https://junglewise.ai/threats/cve-2025-66646-riot-is-an-open-source-microcontroller-operating-system-designed) (high, CVSS 7.5, published 17 Dec 2025) - [CVE-2026-107838: RIOT nanocoap_fileserver assertion failure in response handling](https://junglewise.ai/threats/cve-2026-107838-riot-is-an-open-source-microcontroller-operating-system-designed) (high, CVSS 7.5, published 9 Oct 2026) - [CVE-2026-107836: RIOT nanoCoAP client buffer underflow in blockwise transfer](https://junglewise.ai/threats/cve-2026-107836-riot-is-an-open-source-microcontroller-operating-system-designed) (info, published 9 Oct 2026) ## Vulnerabilities per week 2 vulnerabilities in the last four weeks, down 33% on the four before (3). 2 critical against 0. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 3 | 0 | 0 | | 12 Oct 2026 | 2 | 2 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Riot-Os RIOT vulnerabilities", https://junglewise.ai/threats/technologies/riot, 9 November 2026.