CVSS 3.1
7.1 highCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:HCVE-2026-113782
High (7.1).
ESP-IDF is the Espressif Internet of Things (IOT) Development Framework. From 5.2.0 until 5.2.8, 5.3.6, 5.4.5, 5.5.5, and 6.0.3, the OpenThread Border Router Neighbor Discovery packet handler trusts an attacker-controlled ICMPv6 option length while copying into a fixed stack buffer. A host on the same infrastructure link as the Border Router can send a crafted ICMPv6 Router Advertisement to its infrastructure interface whose oversized length causes an out-of-bounds write into adjacent stack memory. Firmware is affected only when CONFIG_OPENTHREAD_BORDER_ROUTER=y; Thread end devices, routers, and RCP firmware without the Border Router feature are unaffected. Exploitation requires no authentication or user interaction and can crash or reboot the device or corrupt adjacent stack state. This issue is fixed in versions 5.2.8, 5.3.6, 5.5.5, and 6.0.3 and is scheduled to be fixed in version 5.4.5.
Severity
- CWE
- CWE-121 Stack-based Buffer Overflow
- Published
- Record from
- the NVD, synced
Ask an AI about this CVE
Show the prompt
Explain CVE-2026-113782 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-113782?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-113782?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-113782 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| espressif esp-idf | >= 5.2.0, < 5.2.8 |
| espressif esp-idf | >= 5.3.0, < 5.3.6 |
| espressif esp-idf | >= 5.4.0, < 5.4.5 |
| espressif esp-idf | >= 5.5.0, < 5.5.5 |
| espressif esp-idf | >= 6.0.0, < 6.0.3 |
References
- https://github.com/espressif/esp-idf/commit/4068c4e7d061b3e2d6096734509feadc14594e28
- https://github.com/espressif/esp-idf/commit/b6860b2db50406adf0aaebd75f2e9fe64cc805a9
- https://github.com/espressif/esp-idf/commit/c22480ba07fc1de454a63d42275c764d95c7bd9c
- https://github.com/espressif/esp-idf/commit/c828d0d709f1c46fa2b9e1ed3ce9d8dc4b29c42f
- https://github.com/espressif/esp-idf/commit/e18d27e480aec2b282898f4afc22b0f738ea7c04
- https://github.com/espressif/esp-idf/commit/f9bb1be59081ccef03a1b4b1fab9a225f28b1b61
- https://github.com/espressif/esp-idf/security/advisories/GHSA-c26h-gm53-qg83