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PatchSiren cyber security CVE debrief

CVE-2020-15999 Google CVE debrief

CVE-2020-15999 is a Google Chrome FreeType heap buffer overflow vulnerability that CISA included in its Known Exploited Vulnerabilities catalog. The KEV listing means defenders should treat it as a priority patch item, not a routine maintenance issue. CISA’s catalog directs organizations to apply updates per vendor instructions, and the remediation deadline in the supplied timeline is 2021-11-17.

Vendor
Google
Product
Chrome FreeType
CVSS
HIGH 8.8
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Organizations running Google Chrome on managed endpoints, virtual desktops, or shared workstations should prioritize this issue. Security operations, vulnerability management, and endpoint administration teams should confirm that all Chrome installations receive the vendor fix and that update enforcement is working.

Technical summary

The supplied official records describe a heap buffer overflow in FreeType as used by Google Chrome. CISA’s KEV catalog records this vulnerability as known to be exploited and links to the official CVE and NVD entries for reference. The provided corpus does not include a CVSS score or additional exploit mechanics, so defensive handling should rely on the KEV status and vendor patch guidance.

Defensive priority

High. CISA has listed CVE-2020-15999 in the KEV catalog, which is a strong signal to expedite patching and verification across the fleet.

Recommended defensive actions

  • Apply the Google Chrome update or vendor-provided remediation that addresses CVE-2020-15999 on all affected systems.
  • Verify coverage across desktops, laptops, VDI, and any managed Chrome deployments, including systems that may not be actively used every day.
  • Use the CISA KEV due date of 2021-11-17 as the remediation target and escalate any systems that miss it.
  • Re-scan for vulnerable Chrome versions after patching and confirm that auto-update or software management policies are enforcing the fix.

Evidence notes

This debrief is based only on the supplied CISA KEV source item and the official CVE/NVD resource links. The corpus confirms the vulnerability name, KEV status, date added, due date, and required action to apply updates per vendor instructions. The supplied data does not include a CVSS score or further technical exploit details.

Sources and references

Verified primary and authoritative sources

  • CVE-2020-15999 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2020-15999

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2020-15999 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2020-15999

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.