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CVE-2024-9680

Critical Vulnerability: CVE-2024-9680 — mozilla, debian — firefox, thunderbird

CISA Known Exploited Vulnerability — Immediate Action Required

An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines. We have had reports of this vulnerability being exploited in the wild. This vulnerability affects Firefox < 131.0.2, Firefox ESR < 128.3.1, Firefox ESR < 115.16.1, Thunderbird < 131.0.1, Thunderbird < 128.3.1, and Thunderbird < 115.16.0.

Tuesday, August 4, 2026mozillaVulnios Threat Intelligence
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Vulnerability Snapshot

CVE-2024-9680 is rated CRITICAL — exploitation is trivial or already observed in the wild and impact is severe. Patch immediately, not on the next maintenance window.

This vulnerability appears in CISA's Known Exploited Vulnerabilities (KEV) catalog, meaning it has been observed in active attacks. Federal agencies have a remediation deadline; commercial defenders should treat it with equivalent urgency.

Affected technology: firefox, thunderbird, debian_linux.

Executive Summary

An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines. We have had reports of this vulnerability being exploited in the wild. This vulnerability affects Firefox < 131.0.2, Firefox ESR < 128.3.1, Firefox ESR < 115.16.1, Thunderbird < 131.0.1, Thunderbird < 128.3.1, and Thunderbird < 115.16.0.

Why It Matters

CVE-2024-9680 is rated CRITICAL severity, requiring immediate attention from security teams.

⚠️ This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, indicating it has been actively exploited in the wild. Federal agencies must remediate by the deadline.

CVSS Base Score: 9.8/10

EPSS (Exploit Prediction): 23.2% probability of exploitation in the next 30 days.

Affected Technologies

Vendors: mozilla, debian

Products: firefox, thunderbird, debian_linux

🛡️What Defenders Should Check

  • Check if you are affected — Review your asset inventory for products listed in CVE-2024-9680.
  • Apply available patches — Visit vendor advisories for the latest security updates.
  • Monitor for exploitation — Check your SIEM/IDS logs for related indicators.
  • Prioritize remediation — This is a CISA KEV entry. Federal agencies: remediate by the mandated deadline.
  • CISA Deadline: 2024-11-05

    • Use Vulnios to continuously monitor your exposure to CVE-2024-9680 and similar vulnerabilities.

    References & Sources

  • https://bugzilla.mozilla.org/show_bug.cgi?id=1923344
  • https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2024-49039
  • https://www.mozilla.org/security/advisories/mfsa2024-51/
  • https://www.mozilla.org/security/advisories/mfsa2024-52/
  • https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=281992
  • https://lists.debian.org/debian-lts-announce/2024/10/msg00005.html
  • https://lists.debian.org/debian-lts-announce/2024/10/msg00006.html
  • https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-9680

    • How Vulnios Detects This

    Vulnios scans for this vulnerability using Trivy and Grype for CVE matching against your container images and OS package manifests. Run a scan against your environment to see whether you are exposed; findings are linked back to the original CVE record so triage starts with the patch path already known.

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    Affected Products

    firefoxthunderbirddebian_linux

    Sources

    Related Threat Alerts

    Frequently Asked Questions

    What is CVE-2024-9680?

    CVE-2024-9680 is a critical-severity vulnerability tracked under the Common Vulnerabilities and Exposures program. An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines. We have had reports of this vulnerability being exploited in the wild. This

    Am I affected?

    Check whether your environment runs firefox, thunderbird, debian_linux. If you operate any of those, treat yourself as in scope until you have evidence otherwise. A Vulnios scan will identify the exact assets carrying the affected version.

    How urgent is the response?

    Critical: do not wait for your normal patch cycle. Verify exposure today, apply the vendor patch immediately, and add detection rules for any post-exploit indicators.

    How do I remediate?

    Apply the vendor patch listed in the upstream advisory linked under Sources. If the patch is not yet available, follow the vendor-supplied workaround (often a config flag or feature disable) and add detections for the published exploit pattern in your SIEM. Re-scan after the patch lands to confirm the finding clears.

    Where can I track exploitation activity?

    Watch CISA's Known Exploited Vulnerabilities catalog for CVE-2024-9680. Cross-reference with public exploit databases and your own SIEM/IDS for indicator-of-compromise patterns. Vulnios tracks KEV status automatically and surfaces it on the asset findings view.

    How does Vulnios help with this?

    Vulnios continuously cross-references your asset inventory against the live CVE feed (NVD, vendor advisories, CISA KEV, and curated OSINT). When a new CVE matches your environment, you get a prioritized finding with the severity, KEV status, exploit-prediction (EPSS), and a direct path to the vendor patch. You can start a free scan from the homepage.

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