CVE-2024-4760Public exploit

Firmware and memory access via startup voltage glitch

Published May 16, 2024 · Updated Jun 6, 2025

Fault injection in Microchip SAM E70/S70/V70/V71, G55, 4C/4S/4N/4E, and 3S/3N/3U MCUs allows attackers to bypass debug locking. During startup, the EEFC reads the flash security bit without sufficient voltage-glitch protection, so a precisely timed voltage drop makes the enabled bit read as disabled. Physical access, power-analysis or timing equipment, a fault injector, and a debug probe enable firmware and SRAM extraction plus control of registers and peripherals.

CVSS severity6.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Fault injection in Microchip SAM E70/S70/V70/V71, G55, 4C/4S/4N/4E, and 3S/3N/3U MCUs allows attackers to bypass debug locking. During startup, the EEFC reads the flash security bit without sufficient voltage-glitch protection, so a precisely timed voltage drop makes the enabled bit read as disabled. Physical access, power-analysis or timing equipment, a fault injector, and a debug probe enable firmware and SRAM extraction plus control of registers and peripherals.

The record

CVE
CVE-2024-4760
Published
May 16, 2024
Updated
Jun 6, 2025
Vendor
Microchip Technology
Product
SAM4S
Classifications
CWE-1247
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Microchip Technology · SAM4Sversion=0
Microchip Technology · Microchip SAM V70version=*
Microchip Technology · SAM4Eversion=0
Microchip Technology · SAM3Sversion=0
Microchip Technology · SAMV70version=0
Microchip Technology · Microchip SAM V71version=*
Microchip Technology · Microchip SAM E70version=*
Microchip Technology · SAME70version=0
Microchip Technology · SAMG55version=0
Microchip Technology · SAM4Nversion=0
Microchip Technology · SAMV71version=0
Microchip Technology · SAM3Uversion=0
Microchip Technology · Microchip SAM S70version=*
Microchip Technology · SAM4Cversion=0
Microchip Technology · SAM3Nversion=0
Microchip Technology · SAMS70version=0

Published CVSS scores

6.3Microchip TechnologyCVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1247Improper Protection Against Voltage and Clock Glitches

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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