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Google · Memory corruption

Google Chromium WebP Heap-Based Buffer Overflow Vulnerability

CVE-2026-16438

What this means

This is rated critical severity (9.4 out of 10). There is no confirmed exploitation of it yet. Ask IT whether the affected products are in your estate.

Full vendor description

Incorrect Privilege Assignment vulnerability in Mitsubishi Electric GENESIS64 versions 10.97.3 and prior, ICONICS Suite versions 10.97.3 and prior, Hyper Historian versions 10.97.3 and prior, AnalytiX versions 10.97.3 and prior, MobileHMI 10.97.3 and prior, MC Works64 all versions, Mitsubishi Electric Iconics Digital Solutions GENESIS64 versions 10.97.3 and prior, ICONICS Suite versions 10.97.3 and prior, Hyper Historian versions 10.97.3 and prior, AnalytiX versions 10.97.3 and prior, and MobileHMI 10.97.3 and prior allows an attacker who can log in using the same administrator account for the affected products to launch and operate DCOM objects locally or remotely. During installation, the installers of the affected products unnecessarily grant default DCOM permissions to the administrator account of the affected products. Users with that administrator accounts can locally or remotely launch and operate DCOM objects that should require UAC elevation. As a result, the attacker may disclose, tamper with, destroy, or delete internal information, or cause the affected system to enter a denial-of-service (DoS) condition.

Scoring and exploitation

9.4/ 10
CVSS 4.0 base scoreCritical

Exploitable over the network with an administrator-level account, and no one has to click or open anything. High impact on confidentiality, integrity, availability, subsequent confidentiality, subsequent integrity and subsequent availability.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploitability

Longer bar: easier to attack

Attack vectorNetworkAV:N
Attack complexityLowAC:L
Attack requirementsNoneAT:N
Privileges requiredHighPR:H
User interactionNoneUI:N

Impact

Longer bar: more harm

ConfidentialityHighVC:H
IntegrityHighVI:H
AvailabilityHighVA:H
Subsequent confidentialityHighSC:H
Subsequent integrityHighSI:H
Subsequent availabilityHighSA:H
~0.3% estimated chance of attack in 30 daysModel estimate (): a probability signal, not confirmed exploitation
Exploited in the wild
Not confirmed in the
Not reported

Weaknesses

CWE-266

References

3 links from the CVE record, grouped by site.

  • Type Vulnerability

    A vulnerability in Google Chromium's WebP component could allow attackers to execute arbitrary code, bypass authentication, or cause system denial-of-service conditions.

    Next step: Confirm whether Google Chrome is in your estate.

    Who's reporting

    1 of 3 perspectives

    Official authority: Official 2Vendor statement missing. no VendorResearcher coverage missing. no Researcher2 signals

    Only official coverage so far. Treat as an early signal.

    CVE-2023-4863+3