How severe is CVE-2025-9186?

CVE-2025-9186 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2025-9186 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-9186?

CVE-2025-9186 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-9186?

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

Does CVE-2025-9186 have an EU (EUVD) identifier?

Yes. CVE-2025-9186 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25242.

When was CVE-2025-9186 published?

CVE-2025-9186 was published on 2025-08-19 and last updated on 2026-06-17.

CVE-2025-9186

CVE-2025-9186 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 3.x base score of 6.5. 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-451.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-25242
Weakness: CWE-451
Affected product: Mozilla Firefox
Published: 2025-08-19
Last modified: 2026-06-17

Description

Spoofing issue in the Address Bar component of Firefox Focus for Android. This vulnerability was fixed in Firefox 142.

Frequently asked questions

What is CVE-2025-9186?: Spoofing issue in the Address Bar component of Firefox Focus for Android. This vulnerability was fixed in Firefox 142.
How severe is CVE-2025-9186?: CVE-2025-9186 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2025-9186 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-9186?: CVE-2025-9186 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-9186?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-9186 have an EU (EUVD) identifier?: Yes. CVE-2025-9186 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25242.
When was CVE-2025-9186 published?: CVE-2025-9186 was published on 2025-08-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*

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