How severe is CVE-2025-4609?

CVE-2025-4609 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-4609 being actively exploited?

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

What products are affected by CVE-2025-4609?

CVE-2025-4609 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-4609?

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

Does CVE-2025-4609 have an EU (EUVD) identifier?

Yes. CVE-2025-4609 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25768.

When was CVE-2025-4609 published?

CVE-2025-4609 was published on 2025-08-22 and last updated on 2026-06-17.

CVE-2025-4609

CVE-2025-4609 is a critical-severity vulnerability in Google Chrome with a CVSS 3.x base score of 9.6. 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-732.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-25768
Weakness: CWE-732
Affected product: Google Chrome
Published: 2025-08-22
Last modified: 2026-06-17

Description

Incorrect handle provided in unspecified circumstances in Mojo in Google Chrome on Windows prior to 136.0.7103.113 allowed a remote attacker to potentially perform a sandbox escape via a malicious file. (Chromium security severity: High)

Frequently asked questions

What is CVE-2025-4609?: Incorrect handle provided in unspecified circumstances in Mojo in Google Chrome on Windows prior to 136.0.7103.113 allowed a remote attacker to potentially perform a sandbox escape via a malicious file. (Chromium security severity: High)
How severe is CVE-2025-4609?: CVE-2025-4609 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-4609 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-4609?: CVE-2025-4609 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-4609?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-4609 have an EU (EUVD) identifier?: Yes. CVE-2025-4609 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25768.
When was CVE-2025-4609 published?: CVE-2025-4609 was published on 2025-08-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

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