Security readout for executives and security teams
Plain-English summary
CVE-2021-4102 is a high-severity Chrome vulnerability in V8, Chrome’s JavaScript engine. A malicious web page could potentially corrupt memory on affected Chrome versions before 96.0.4664.110. Because CISA lists it as known exploited, organizations should treat old Chrome installations as urgent patch targets.
Executive priority
Prioritize remediation because this is browser-exposed, high impact, and listed in CISA KEV. The business risk is strongest where users can reach attacker-controlled web content with outdated Chrome.
Technical view
The CVE describes a CWE-416 use-after-free flaw in V8. The CVSS 3.1 score is 8.8, with network attack vector, low complexity, no privileges required, and user interaction required. The public description says exploitation could occur through a crafted HTML page and potentially lead to heap corruption.
Likely exposure
Exposure is primarily Google Chrome installations older than 96.0.4664.110, especially on endpoints where users browse untrusted sites or open external links. The bundle does not identify other affected products.
Exploitation context
Active exploitation is supported by CISA KEV listing for CVE-2021-4102. Public sources in the bundle do not provide exploit mechanics, observed campaigns, or reliable details about attacker tooling.
Researcher notes
Evidence is sufficient for affected version boundary, vulnerability class, CVSS, and KEV status. Public details are limited: the bundle does not include root-cause analysis, exploit indicators, or proof-of-concept details. Validation should center on version compliance and update telemetry.
Mitigation direction
- Upgrade Google Chrome to 96.0.4664.110 or later across managed endpoints.
- Confirm Chrome automatic updates are enabled and completing successfully.
- Prioritize laptops, unmanaged endpoints, and high-risk browsing users.
- Check Google guidance for any remaining affected Chrome channel details.
Validation and detection
- Inventory Chrome versions and flag anything older than 96.0.4664.110.
- Confirm vulnerability scanner findings close after browser updates.
- Review endpoint management logs for failed or delayed Chrome updates.
- Track any update exceptions until they are remediated or retired.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
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 lookupCVE-2021-4102 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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.
CISA KEV status
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:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://chromereleases.googleblog.com/2021/12/stable-channel-update-for-desktop_13.htmlCVE reference · x_refsource_MISC
- https://crbug.com/1278387CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-4102CVE reference · government-resource
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.