CVE-2024-25077

Arbitrary code execution via unsigned flash nonce

Published Jul 10, 2024 · Updated Aug 8, 2024

Secure-boot bypass in Renesas SmartBond DA14695 allows physically proximate attackers to execute arbitrary code from external flash. The on-the-fly decryption path accepts a nonce from an unsigned image header, so changing it alters AES-CTR decryption without invalidating the secure-boot signature. Physical flash access is required; remote and over-the-air access cannot reach the flaw, but successful manipulation defeats secure boot and runs injected code.

CVSS severity5.4
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Secure-boot bypass in Renesas SmartBond DA14695 allows physically proximate attackers to execute arbitrary code from external flash. The on-the-fly decryption path accepts a nonce from an unsigned image header, so changing it alters AES-CTR decryption without invalidating the secure-boot signature. Physical flash access is required; remote and over-the-air access cannot reach the flaw, but successful manipulation defeats secure boot and runs injected code.

The record

CVE
CVE-2024-25077
Published
Jul 10, 2024
Updated
Aug 8, 2024
Vendor
Renesas Electronics
Product
DA14695
Classifications
CWE-94, T1601.001
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 8, 2024Record 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=da14691
  2. Affected versionversion=da14695
  3. Affected versionversion=da14697
  4. Affected versionversion=da14699

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Renesas Electronics · DA14695version=da14691; version=da14695; version=da14697; version=da14699

Published CVSS scores

5.4Renesas ElectronicsCVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1601.001Patch System Image

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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