Security Digest · Vulnerability record · Known exploited
CVE-2025-5419: Google Chromium V8 Out-of-Bounds Read and Write Vulnerability
Exploited in the wild (CISA KEV). Out of bounds read and write in V8 in Google Chrome prior to 137.0.7151.68 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
CISA KEV · added 2025-06-05 CVSS 8.8 High EPSS 7.8% · p95
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run Google Chromium V8. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-06-05, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-06-26; treat that as the outer limit, not the target.
- EPSS 7.8%, percentile 95: FIRST’s model estimates a 7.8% chance of exploitation activity in the next 30 days, higher than 95% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.
What it is
Out of bounds read and write in V8 in Google Chrome prior to 137.0.7151.68 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
CISA’s summary
Google Chromium V8 contains an out-of-bounds read and write vulnerability that could allow a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
Weakness type: CWE-125, CWE-787.
Product: Google Chromium V8 · Assigned by: Chrome · Published: 2025-06-02
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Chrome | 137.0.7151.68 < 137.0.7151.68 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: required (a user must click/open something)
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2025-06-05; federal due date 2025-06-26. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active, automatable no, technical impact total.
- FIRST EPSS (model of 2026-10-21): 7.82% probability of exploitation activity in the next 30 days; percentile 95.
Timeline
- — CVE record published by Chrome
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (chromereleases.googleblog.com) chromereleases.googleblog.com
Vulnerability records
- CVE.org record CVE-2025-5419 cve.org
- NVD entry CVE-2025-5419 nvd.nist.gov
Government
- CISA Known Exploited Vulnerabilities catalog entry cisa.gov
- Listed in CISA KEV notes (nvd.nist.gov) nvd.nist.gov
Other references from the CVE record and advisory
- issues.chromium.org issues.chromium.org
- msrc.microsoft.com msrc.microsoft.com
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