# OpenWrt Odhcpd vulnerabilities

Source: https://junglewise.ai/threats/technologies/odhcpd  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 12 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/odhcpd.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in OpenWrt Odhcpd: 0 in the last 7 days and 5 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-55606, was published on 23 October 2026. 5 vulnerabilities in the last four weeks, up from none in the four before. 1 critical against 0.

## Counts

- Last 7 days: 0
- Last 30 days: 4
- Last 90 days: 5
- All time: 5 (1 critical, 0 exploited in the wild)

## About OpenWrt Odhcpd

DHCP server implementation for OpenWrt that manages IP address allocation.

## Latest OpenWrt Odhcpd vulnerabilities

- [CVE-2026-55606: odhcpd out-of-bounds read in DHCPv6 self-loop detection](https://junglewise.ai/threats/cve-2026-55606-odhcpd-is-the-dhcpv6-dhcpv4-and-router-advertisement-server-used) (medium, CVSS 6.5, published 23 Oct 2026)
- [CVE-2026-53921: odhcpd DHCPv6 stack buffer overflow in IA response handler](https://junglewise.ai/threats/cve-2026-53921-odhcpd-is-the-dhcpv6-dhcpv4-and-router-advertisement-server-used) (critical, CVSS 9.8, published 23 Oct 2026)
- [CVE-2026-53920: odhcpd DHCPv6 IA parser stack buffer overread](https://junglewise.ai/threats/cve-2026-53920-odhcpd-is-the-dhcpv6-dhcpv4-and-router-advertisement-server-used) (info, published 23 Oct 2026)
- [CVE-2026-53918: odhcpd heap-use-after-free in DHCPv6 IA handler](https://junglewise.ai/threats/cve-2026-53918-odhcpd-is-the-dhcpv6-dhcpv4-and-router-advertisement-server-used) (info, published 23 Oct 2026)
- [CVE-2026-53922: odhcpd integer underflow in DHCPv6 IA handling](https://junglewise.ai/threats/cve-2026-53922-odhcpd-is-the-dhcpv6-dhcpv4-and-router-advertisement-server-used) (medium, CVSS 6.5, published 12 Oct 2026)

## Most severe OpenWrt Odhcpd vulnerabilities

- [CVE-2026-53921: odhcpd DHCPv6 stack buffer overflow in IA response handler](https://junglewise.ai/threats/cve-2026-53921-odhcpd-is-the-dhcpv6-dhcpv4-and-router-advertisement-server-used) (critical, CVSS 9.8, published 23 Oct 2026)
- [CVE-2026-53922: odhcpd integer underflow in DHCPv6 IA handling](https://junglewise.ai/threats/cve-2026-53922-odhcpd-is-the-dhcpv6-dhcpv4-and-router-advertisement-server-used) (medium, CVSS 6.5, published 12 Oct 2026)
- [CVE-2026-55606: odhcpd out-of-bounds read in DHCPv6 self-loop detection](https://junglewise.ai/threats/cve-2026-55606-odhcpd-is-the-dhcpv6-dhcpv4-and-router-advertisement-server-used) (medium, CVSS 6.5, published 23 Oct 2026)
- [CVE-2026-53920: odhcpd DHCPv6 IA parser stack buffer overread](https://junglewise.ai/threats/cve-2026-53920-odhcpd-is-the-dhcpv6-dhcpv4-and-router-advertisement-server-used) (info, published 23 Oct 2026)
- [CVE-2026-53918: odhcpd heap-use-after-free in DHCPv6 IA handler](https://junglewise.ai/threats/cve-2026-53918-odhcpd-is-the-dhcpv6-dhcpv4-and-router-advertisement-server-used) (info, published 23 Oct 2026)

## Vulnerabilities per week

5 vulnerabilities in the last four weeks, up from none in the four before. 1 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 | 0 | 0 | 0 |
| 12 Oct 2026 | 1 | 0 | 0 |
| 19 Oct 2026 | 4 | 1 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other OpenWrt technologies

- [OpenWrt](https://junglewise.ai/threats/technologies/openwrt): 22 vulnerabilities
- [OpenWrt LuCI](https://junglewise.ai/threats/technologies/luci): 4 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, "OpenWrt Odhcpd vulnerabilities", https://junglewise.ai/threats/technologies/odhcpd, 12 November 2026.