Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable updater with no signature check and JWT-bypassable authorization gives AV:N/AC:L/PR:N; unsigned firmware install yields full C:H/I:H/A:H, and code execution reaching connected charging systems supports S:C.
Primary rating from Vendor (DIVD).
CVSS VectorVendor: DIVD
Lifecycle Timeline
3DescriptionCVE.org
The firmware update mechanism does not include cryptographic signature validation. This allows anyone with access to the firmware update capability to upload arbitrary files which can then lead to arbitrary code execution.
AnalysisAI
Arbitrary code execution in the EVBEE DC-80 EV charging station stems from a firmware update mechanism that ships without cryptographic signature validation (CWE-347), letting an attacker who reaches the update capability push a malicious firmware image and have it executed by the device. Reported by DIVD (advisory DIVD-2026-00001) with a CVSS 4.0 base score of 9.3 and a 'Jwt Attack' angle noted in triage tags, the flaw grants full compromise of the charger. There is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Technical ContextAI
The affected component is the firmware update pathway of the EVBEE DC-80, a network-reachable DC electric-vehicle charging unit (CPE cpe:2.3:a:evbee:dc-80). The root cause is CWE-347 (Improper Verification of Cryptographic Signature): the updater accepts and installs firmware images without verifying an authenticity/integrity signature, so it cannot distinguish vendor-signed firmware from attacker-supplied files. Combined with the 'Jwt Attack' tag, this suggests the update endpoint's authorization is JWT-based and may be forgeable or bypassable, allowing an attacker to reach an interface that then trusts any uploaded binary. Because uploaded firmware runs with the device's own privileges after installation, an unsigned upload converts directly into arbitrary code execution on the embedded controller.
RemediationAI
No vendor-released patch or fixed firmware version is identified in the provided data, so remediation should center on compensating controls until the vendor publishes signed firmware: place DC-80 chargers on an isolated management VLAN and block inbound access to the firmware update / management interface from untrusted networks and the internet, restricting it to a trusted administrative host or VPN (trade-off: legitimate remote firmware pushes must then originate from that controlled path). Because the 'Jwt Attack' tag implicates the authorization layer, rotate or invalidate any static or predictable JWT signing secrets and enforce short token lifetimes if configurable, and monitor the update endpoint for unexpected upload attempts. Track DIVD advisory DIVD-2026-00001 (https://csirt.divd.nl/DIVD-2026-00001/) for the official fix and, once available, upgrade to the vendor's signed-firmware release. Note that network isolation is the most reliable operator-side mitigation here, since the underlying missing-signature-check flaw cannot be closed without vendor firmware.
More in Jwt Attack
View allWhy is Microsoft republishing a CVE from 2013? We are republishing CVE-2013-3900 in the Security Update Guide to update
Authentication bypass in SimpleHelp 5.5.15 and prior (plus 6.0 pre-release builds) allows remote unauthenticated attacke
Authentication bypass in Fortinet FortiOS, FortiProxy, and FortiSwitchManager allows unauthenticated remote attackers to
ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. Rated critical severity (CVS
ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. Rated critical severity (CVS
The package jsrsasign before 10.5.25 are vulnerable to Improper Verification of Cryptographic Signature when JWS or JWT
A library injection vulnerability exists in Microsoft Teams (work or school) 24046.2813.2770.1094 for macOS. Rated criti
A library injection vulnerability exists in the WebView.app helper app of Microsoft Teams (work or school) 24046.2813.27
A library injection vulnerability exists in the com.microsoft.teams2.modulehost.app helper app of Microsoft Teams (work
The Ruby SAML library is for implementing the client side of a SAML authorization. Rated critical severity (CVSS 9.8), t
cosign is a container signing and verification utility. Rated critical severity (CVSS 9.8), this vulnerability is remote
Biscuit is an authentication and authorization token for microservices architectures. Rated critical severity (CVSS 9.8)
Share
External POC / Exploit Code
Leaving vuln.today
EUVD-2026-43331