---
cve: "CVE-2026-5818"
severity: "HIGH"
cvss: 7.2
epss: "16%"
vendor: "Caliptra"
kev: false
exploited: false
published: "2026-06-24 00:16:33"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T17:29:23+02:00"
---

# CVE-2026-5818

> 7.2 HIGH · 🧪 PoC

## Beschreibung

Incorrect check of function return value in Caliptra Core Runtime Firmware (ActivateFirmwareCmd::activate_fw modules) allows bypass of Caliptra Core's verification of the MCU FW during a hitless update.

This issue affects Core Runtime Firmware: from 2.0.0 through 2.0.1, 2.1.0.

## CVSS-Vektor

```
CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:H/SC:H/SI:H/SA:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Benachbart | warn |
| AC Komplexität | Gering | bad |
| PR Privilegien | Hoch | good |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 3824083e4632ecbdff50aa2e723e89fa42d9dcf6 (Commit)

## Referenzen

- <https://github.com/chipsalliance/caliptra-sw/security/advisories/GHSA-456r-gcjr-6rxq>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-5818) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_