CVE-2025-14174: Google Chromium Out of Bounds Memory Access Vulnerability

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. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-12-12, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-01-02; treat that as the outer limit, not the target.
• EPSS 22.3%, percentile 98: FIRST’s model estimates a 22.3% chance of exploitation activity in the next 30 days, higher than 98% of all scored CVEs (very high). 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 memory access in ANGLE in Google Chrome on Mac prior to 143.0.7499.110 allowed a remote attacker to perform out of bounds memory access via a crafted HTML page. (Chromium security severity: High)

CISA’s summary

Google Chromium contains an out of bounds memory access vulnerability in ANGLE that could allow a remote attacker to perform out of bounds memory access 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-119.

Product: Google Chromium · Assigned by: Chrome · Published: 2025-12-12

Affected and fixed versions

Severity scores

• 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 2025-12-12; federal due date 2026-01-02. 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): 22.33% probability of exploitation activity in the next 30 days; percentile 98.

Timeline

• 2025-12-12 — Added to CISA’s Known Exploited Vulnerabilities catalog
• 2025-12-12 — CVE record published by Chrome
• 2026-01-02 — CISA remediation deadline for US federal agencies
• 2026-09-21 — 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

1. Listed in CISA KEV notes (chromereleases.googleblog.com) chromereleases.googleblog.com
2. Listed in CISA KEV notes (learn.microsoft.com) learn.microsoft.com

Vulnerability records

1. CVE.org record CVE-2025-14174 cve.org
2. NVD entry CVE-2025-14174 nvd.nist.gov

Government

1. CISA Known Exploited Vulnerabilities catalog entry cisa.gov

Other references from the CVE record and advisory

1. issues.chromium.org issues.chromium.org

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