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PatchSiren cyber security CVE debrief

CVE-2021-37976 Google CVE debrief

CVE-2021-37976 is a Google Chromium information disclosure vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2021-11-03. Because it is tracked as known exploited, organizations should treat remediation as urgent and follow vendor update guidance as soon as possible.

Vendor
Google
Product
Chromium
CVSS
Unknown
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

Security teams, IT administrators, and endpoint owners responsible for Chromium or Chromium-based deployments should prioritize this issue. It is especially important for organizations that centrally manage browser updates or rely on Chromium-based applications.

Technical summary

The available source material identifies the issue only as a Chromium information disclosure vulnerability. CISA’s KEV listing indicates it is considered known exploited, but the provided corpus does not include a root cause, affected version range, or exploit details. Defensive response should therefore focus on rapid patching and verification rather than attempting to reproduce the issue.

Defensive priority

High

Recommended defensive actions

  • Apply updates per vendor instructions as soon as possible.
  • Prioritize remediation across all Chromium and Chromium-based deployments.
  • Verify that managed update mechanisms are functioning and that endpoints receive the fixed release.
  • Track completion of remediation before the CISA KEV due date and confirm affected systems are no longer exposed.
  • Monitor vendor and official vulnerability advisories for any additional guidance or affected-version details.

Evidence notes

This debrief is based only on the supplied CISA KEV source item and the official CVE/NVD links. The source metadata identifies the vulnerability as a Google Chromium information disclosure issue, with CISA KEV dateAdded 2021-11-03 and dueDate 2021-11-17. No CVSS score or deeper technical root-cause details were provided in the corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-37976 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-37976

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

  • CVE-2021-37976 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-37976

    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.