Analyst readout for executives and security teams
Plain-English summary
This Chrome flaw could let an attacker break out of Chrome's sandbox after already compromising the renderer process. In business terms, it raises the impact of a browser compromise from tab-level exposure toward deeper device compromise. The source does not show active exploitation, but the severity is high.
Executive priority
Treat this as an urgent browser patching item, not a panic event. It is high impact if chained successfully, but the source does not confirm active exploitation.
Technical view
CVE-2026-9925 is a CWE-416 use-after-free in ANGLE in Google Chrome before 148.0.7778.216. A remote attacker with renderer compromise could potentially escape the sandbox using a crafted HTML page. CVSS 3.1 is 8.3 with network attack vector, user interaction required, high complexity, and changed scope.
Likely exposure
Organizations with Google Chrome desktop installations below 148.0.7778.216 are the likely exposure. Risk is higher where browser updates are delayed or users regularly access untrusted web content.
Exploitation context
The provided sources do not state active exploitation, and KEV status is false. Exploitation is described as requiring a compromised renderer process plus a crafted HTML page, so this is more likely part of a chained browser attack than a standalone initial compromise.
Researcher notes
The public description is limited. It identifies ANGLE, use-after-free, renderer compromise prerequisite, possible sandbox escape, and crafted HTML trigger. The Chromium issue may contain restricted details, so avoid assuming exploit mechanics or affected platforms beyond Chrome before 148.0.7778.216.
Mitigation direction
- Update Google Chrome desktop to 148.0.7778.216 or later.
- Confirm managed Chrome update policies are enforcing timely browser updates.
- Prioritize endpoints used for web access to sensitive applications.
- Check Google's Chrome release guidance for platform-specific update details.
Validation and detection
- Inventory Chrome versions across managed endpoints.
- Flag any Chrome installation below 148.0.7778.216.
- Verify update telemetry after patch deployment.
- Review EDR or browser security alerts for chained browser compromise indicators.
Public sources used
Based on public source material and reviewed before publication.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-416: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-9925 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H 1.6 6 CISA-ADP Vulnerability scoring details
Base CVSS 3.1 score
8.3 HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reserved CVE Program
The CVE ID was reserved by the assigning CNA.
- CVE published CVE Program
The CVE record was published.
- CVE updated CVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 source CVE List V5
- https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html CVE reference, Chrome
- https://issues.chromium.org/issues/500536458 CVE reference, Chrome
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.