CVE-2023-20577
CVSS v3
7.4
HIGH
EPSS Score
0.2 %
exploit probability, as of 2026-09-28
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A heap overflow in SMM module may allow an attacker with access to a second vulnerability that enables writing to SPI flash, potentially resulting in arbitrary code execution.
Technical details
- Published
- 2026-09-02
- Last Modified
- 2026-09-03
Frequently asked questions
What is CVE-2023-20577?
A heap overflow in SMM module may allow an attacker with access to a second vulnerability that enables writing to SPI flash, potentially resulting in arbitrary code execution.
Is CVE-2023-20577 actively exploited?
Active exploitation of CVE-2023-20577 has not been confirmed. Its EPSS score was 0.2% on 2026-09-28, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2023-20577?
CVE-2023-20577 has a CVSS v3 base score of 7.4 (HIGH severity).
Is CVE-2023-20577 affecting your environment?
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