How severe is CVE-2025-7207?

CVE-2025-7207 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-7207 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-7207?

CVE-2025-7207 primarily affects Mruby. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-7207?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-7207 have an EU (EUVD) identifier?

Yes. CVE-2025-7207 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20759.

When was CVE-2025-7207 published?

CVE-2025-7207 was published on 2025-07-09 and last updated on 2026-06-17.

CVE-2025-7207

CVE-2025-7207 is a low-severity vulnerability in Mruby with a CVSS 3.x base score of 3.3. 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-787.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
CVSS v2: 1.7
CVSS v4: 1.9
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-20759
Weakness: CWE-787
Affected product: Mruby
Published: 2025-07-09
Last modified: 2026-06-17

Description

A vulnerability, which was classified as problematic, was found in mruby up to 3.4.0-rc2. Affected is the function scope_new of the file mrbgems/mruby-compiler/core/codegen.c of the component nregs Handler. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The name of the patch is 1fdd96104180cc0fb5d3cb086b05ab6458911bb9. It is recommended to apply a patch to fix this issue.

Frequently asked questions

What is CVE-2025-7207?: A vulnerability, which was classified as problematic, was found in mruby up to 3.4.0-rc2. Affected is the function scope_new of the file mrbgems/mruby-compiler/core/codegen.c of the component nregs Handler. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The name of the patch is 1fdd96104180cc0fb5d3cb086b05ab6458911bb9. It is recommended to apply a patch to fix this issue.
How severe is CVE-2025-7207?: CVE-2025-7207 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-7207 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-7207?: CVE-2025-7207 primarily affects Mruby. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-7207?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-7207 have an EU (EUVD) identifier?: Yes. CVE-2025-7207 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20759.
When was CVE-2025-7207 published?: CVE-2025-7207 was published on 2025-07-09 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:mruby:mruby:*:*:*:*:*:ruby:*:*
cpe:2.3:a:mruby:mruby:3.4.0:rc:*:*:*:ruby:*:*
cpe:2.3:a:mruby:mruby:3.4.0:rc2:*:*:*:ruby:*:*

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CVE-2022-0631 — Critical (CVSS 9.8): Heap-based Buffer Overflow in Homebrew mruby prior to 3.2.
CVE-2022-0570 — Critical (CVSS 9.8): Heap-based Buffer Overflow in Homebrew mruby prior to 3.2.
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