CVE-2023-35818

MEDIUM
6.8
CVSS Score
Published: July 17, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 06:05 AM UTC
44 products affected across 1 vendorEsp32-pico D4 FirmwareEsp32-wroom 32UE FirmwareEsp32-mini 1U Firmware

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Severity
MEDIUM6.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

An issue was discovered on Espressif ESP32 3.0 (ESP32_rev300 ROM) devices. An EMFI attack on ECO3 provides the attacker with a capability to influence the PC value at the CPU context level, regardless of Secure Boot and Flash Encryption status. By using this capability, the attacker can exploit another behavior in the chip to gain unauthorized access to the ROM download mode. Access to ROM download mode may be further exploited to read the encrypted flash content in cleartext format or execute stub code.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

espressif-esp-eye (same device)
espressif-esp32-d0wd-v3 (same device)
espressif-esp32-d0wdr2-v3 (same device)
espressif-esp32-devkitc (same device)
espressif-esp32-devkitm-1 (same device)
espressif-esp32-mini-1 (same device)
espressif-esp32-mini-1u (same device)
espressif-esp32-pico-d4 (same device)
espressif-esp32-pico-kit (same device)
espressif-esp32-pico-mini-02 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
PHYSICAL
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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