How severe is CVE-2020-23909?

CVE-2020-23909 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2020-23909 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-23909?

CVE-2020-23909 affects Advancemame. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-23909?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-23909 published?

CVE-2020-23909 was published on 2023-07-18 and last updated on 2026-06-17.

CVE-2020-23909

CVE-2020-23909 is a high-severity vulnerability in Advancemame with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Advancemame
Published: 2023-07-18
Last modified: 2026-06-17

Description

Heap-based buffer over-read in function png_convert_4 in file pngex.cc in AdvanceMAME through 2.1.

Frequently asked questions

What is CVE-2020-23909?: Heap-based buffer over-read in function png_convert_4 in file pngex.cc in AdvanceMAME through 2.1.
How severe is CVE-2020-23909?: CVE-2020-23909 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2020-23909 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-23909?: CVE-2020-23909 affects Advancemame. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-23909?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-23909 published?: CVE-2020-23909 was published on 2023-07-18 and last updated on 2026-06-17.

References

https://sourceforge.net/p/advancemame/bugs/285/

Affected products (1)

cpe:2.3:a:advancemame:advancemame:*:*:*:*:*:*:*:*

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