# Contiki-NG vulnerabilities

Source: https://junglewise.ai/threats/vendors/contiki-ng  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/contiki-ng.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Contiki-NG: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-5857, was published on 6 August 2026. 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 3 (0 critical, 0 exploited in the wild)

## Latest Contiki-NG vulnerabilities

- [CVE-2026-5857: Contiki-NG MQTT client buffer overflow in topic parsing](https://junglewise.ai/threats/cve-2026-5857-contiki-ng-mqtt-client-buffer-overflow-in-topic-parsing) (high, CVSS 8.1, published 6 Aug 2026)
- [CVE-2026-5856: Contiki-NG DNS resolver out-of-bounds read in skip_name()](https://junglewise.ai/threats/cve-2026-5856-contiki-ng-dns-resolver-out-of-bounds-read-in-skip-name) (high, CVSS 7.1, published 6 Aug 2026)
- [CVE-2026-5855: Contiki-NG LwM2M TLV parser buffer over-read in lwm2m_tlv_read()](https://junglewise.ai/threats/cve-2026-5855-contiki-ng-lwm2m-tlv-parser-buffer-over-read-in-lwm2m-tlv-read) (high, CVSS 7.5, published 6 Aug 2026)

## Most severe Contiki-NG vulnerabilities

- [CVE-2026-5857: Contiki-NG MQTT client buffer overflow in topic parsing](https://junglewise.ai/threats/cve-2026-5857-contiki-ng-mqtt-client-buffer-overflow-in-topic-parsing) (high, CVSS 8.1, published 6 Aug 2026)
- [CVE-2026-5855: Contiki-NG LwM2M TLV parser buffer over-read in lwm2m_tlv_read()](https://junglewise.ai/threats/cve-2026-5855-contiki-ng-lwm2m-tlv-parser-buffer-over-read-in-lwm2m-tlv-read) (high, CVSS 7.5, published 6 Aug 2026)
- [CVE-2026-5856: Contiki-NG DNS resolver out-of-bounds read in skip_name()](https://junglewise.ai/threats/cve-2026-5856-contiki-ng-dns-resolver-out-of-bounds-read-in-skip-name) (high, CVSS 7.1, published 6 Aug 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| 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 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 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 |

## Contiki-NG technologies

- [Contiki-NG](https://junglewise.ai/threats/technologies/contiki-ng): 3 vulnerabilities

## 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, "Contiki-NG vulnerabilities", https://junglewise.ai/threats/vendors/contiki-ng, 9 November 2026.