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PatchSiren cyber security CVE debrief

CVE-2021-38000 Google CVE debrief

CVE-2021-38000 is a Google Chromium Intents improper input validation vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2021-11-03. Because it is listed as known exploited, defenders should treat it as higher priority than a routine browser-component issue and apply vendor-recommended updates without delay.

Vendor
Google
Product
Chromium Intents
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 and IT teams responsible for Chromium-based browsers, Chromium embeds, and any systems that rely on Google Chromium Intents behavior. Organizations that standardize browser patching should prioritize this CVE because it appears in CISA's KEV catalog.

Technical summary

The supplied corpus identifies the issue only as an improper input validation vulnerability in Google Chromium Intents. No deeper exploit mechanics, affected version range, or impact details were provided in the source corpus. The strongest actionable signal is that CISA classified it as known exploited and directed administrators to apply updates per vendor instructions.

Defensive priority

High. The CISA KEV listing indicates known exploitation, and the due date in the supplied timeline was 2021-11-17. Even without full technical detail in the corpus, KEV status makes this a priority patching item for exposed or widely deployed Chromium-based environments.

Recommended defensive actions

  • Apply vendor updates per instructions as soon as possible.
  • Confirm whether your environment uses Chromium-based browsers, embedded Chromium, or components that depend on Chromium Intents.
  • Prioritize patch deployment to internet-facing and high-risk user endpoints first.
  • Verify remediation by checking installed browser/component versions after updating.
  • Track this CVE in vulnerability management and exception workflows until remediation is complete.

Evidence notes

The only supplied technical description is "Google Chromium Intents Improper Input Validation Vulnerability." CISA's KEV metadata marks it as known exploited, with required action "Apply updates per vendor instructions." The corpus does not include exploit details, affected versions, or a CVSS score, so this debrief avoids unsupported claims.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-38000 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-38000

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

  • CVE-2021-38000 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-38000

    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.