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CVE-2023-31100

HIGH
7.1
CVSS Score
Published: November 14, 2023 at 11:17 PM UTC
Updated: June 17, 2026 at 05:56 AM UTC
2 products affected across 2 vendorsSecurecore TechnologySecureCore Technology

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Severity
HIGH7.1
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

Improper Access Control in SMI handler vulnerability in Phoenix SecureCore™ Technology™ 4 allows SPI flash modification. This issue affects SecureCore™ Technology™ 4: * from 4.3.0.0 before 4.3.0.203 * from 4.3.1.0 before 4.3.1.163 * from 4.4.0.0 before 4.4.0.217 * from 4.5.0.0 before 4.5.0.138

Affected

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

Securecore Technology· Phoenixtech
95%
4.3.0.0 ≤ v < 4.3.0.2034.3.1.0 ≤ v < 4.3.1.1634.4.0.0 ≤ v < 4.4.0.2174.5.0.0 ≤ v < 4.5.0.138
SecureCore Technology· Phoenix
60%
4.3.0.0 ≤ v < 4.3.0.2034.3.1.0 ≤ v < 4.3.1.1634.4.0.0 ≤ v < 4.4.0.2174.5.0.0 ≤ v < 4.5.0.1384.3.0.04.3.1.04.4.0.04.5.0.0
Affected range stops below 4.3.0.203, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.3.1.163, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.0.217, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.5.0.138, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

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

Patch and advisory references

References (2)

Vendor Advisory
Source: 22d9ba52-f336-4b0d-bf1f-0efbdcc3c1de
https://phoenixtech.com/phoenix-security-notifications/cve-2023-31100/
Not Applicable
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.phoenix.com/security-notifications/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

7.1HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-284NVD-CWE-Other

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