Yes. CISA added CVE-2024-4671 to its Known Exploited Vulnerabilities catalogue on 13 May 2024, which it does only when there is reliable evidence of active exploitation. CISA has not linked it to known ransomware campaigns. Google Chromium Visuals contains a use-after-free vulnerability that allows a remote attacker to exploit heap corruption via a crafted HTML page.
What does CISA listing actually tell you?
For a CVE like this, the practical question is not whether the weakness exists in theory, but whether defenders should assume exploitation is already happening. CISA’s KEV inclusion is the strongest signal in the page’s source set that this is an active exposure requiring response, not just a routine browser bug to queue for normal maintenance.
That matters because browser exploitation is often a starting point, not the end state. A remote attacker who can trigger the flaw with a crafted page can turn a single visit into code execution or a foothold for follow-on activity, especially when the browser is used for authenticated work or exposes sensitive session state.
Why browser exploitation changes the response
Use-after-free flaws are memory safety problems, which means the immediate concern is control of the browser process, crash instability, or attacker-directed execution depending on exploit quality. In practice, teams should treat the browser as part of the attack surface for internet-delivered content, not as a passive viewer.
The key operational implication is that exposure is broad and time-sensitive. If users have not restarted, if managed browsers lag policy enforcement, or if endpoints can browse untrusted content during the patch window, the organisation may remain exposed even after the vendor has published a fix path.
The right internal response is to confirm where Chromium-based browsers are deployed, which channels are managed, and whether any systems are pinned, sandboxed differently, or delayed by enterprise update controls. The Enterprise Browser and Browser Security Guide is useful here because browser policy, isolation, extension control, and credential protection all affect blast radius when a browser flaw becomes exploitable.
What to do when patching is delayed
If you cannot patch immediately, the priority is to reduce exposure to the vulnerable code path and to limit the value of any successful browser compromise. That usually means tightening browser policy, reducing access to sensitive applications from at-risk endpoints, and increasing scrutiny on abnormal browser behaviour or unexpected process launches.
For active exploitation issues, KEV status should drive a short exception window, not an open-ended deferment. The practical decision is whether a machine can remain online with normal web access while waiting, or whether it should be isolated, taken out of high-risk browsing roles, or forced through an accelerated update cycle.
Use CISA KEV as the source of truth for prioritisation, then validate the vendor advisory for exact remediation instructions and product-specific update guidance. The CISA Known Exploited Vulnerabilities Catalog and the NIST National Vulnerability Database are the two authoritative places to cross-check record details, while the CVE Program is the canonical identifier source.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
CIS Controls v8 and NIST SP 800-53 Rev 5 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| CIS Controls v8 | CIS-7 — Continuous Vulnerability Management | Active CVE exploitation requires rapid identification and remediation of exposed software. |
| CIS-4 — Secure Configuration of Enterprise Assets and Software | Browser policy, isolation, and managed update settings shape exposure to exploitation. | |
| Recommendation — Prioritise KEV-listed browser flaws for immediate remediation and exception tracking. Harden browser settings and enforce managed update policy on all Chromium-based endpoints. | ||
| NIST SP 800-53 Rev 5 | SI-2 — Flaw Remediation | The question is about exploiting a known flaw and the need to remediate it quickly. |
| RA-5 — Vulnerability Monitoring and Scanning | Teams must confirm whether vulnerable browser instances remain exposed in the environment. | |
| CM-7 — Least Functionality | Reducing browser exposure and limiting risky browsing paths lowers exploit opportunity. | |
| Recommendation — Track the flaw through remediation, validation, and exception closure until fixed. Continuously identify endpoints still running vulnerable Chromium builds. Restrict browser functionality and high-risk access paths until remediation completes. | ||
Practitioner Guidance
What to prioritise: Treat KEV-listed browser flaws as exposure management items first and patching items second. The first question is which users, devices, and browsing paths can actually reach the vulnerable browser build, because that determines the true blast radius.
What to verify: Confirm update propagation, browser restart enforcement, and whether any endpoints still allow untrusted web access before the fix is fully applied. If a device can browse the open web and has not received the remedial update, assume the risk remains live.
Decision rule: If the affected browser is used for authenticated enterprise work, prioritise accelerated remediation and session risk review over normal maintenance sequencing. If patching must wait, narrow browser exposure rather than relying on detection alone.
Practitioner takeaway: With an actively exploited browser CVE, the real control is speed plus exposure reduction. Teams that only queue the patch without constraining who can browse, where, and from what devices usually leave the most valuable attack path intact.
Related resources from NHI Mgmt Group
- CVE-2024-4671 (Google Chromium Visuals Use-After-Free)
- Is CVE-2022-3038 (Google Chromium Network Service Use-After-Free) being exploited in the wild?
- Is CVE-2024-9680 (Mozilla Firefox Use-After-Free) being exploited in the wild?
- Is CVE-2022-22265 (Samsung Mobile Devices Use-After-Free) being exploited in the wild?
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Reviewed and updated by the NHIMG editorial team on October 19, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org