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PatchSiren cyber security CVE debrief

CVE-2022-41049 Microsoft CVE debrief

CVE-2022-41049 is a Microsoft Windows Mark of the Web (MOTW) security feature bypass vulnerability. CISA added it to the Known Exploited Vulnerabilities catalog on 2022-11-14, which is a strong signal to prioritize remediation on Windows endpoints and servers that handle files from untrusted sources.

Vendor
Microsoft
Product
Windows
CVSS
MEDIUM 5.4
CISA KEV
Listed
Original CVE published
2022-11-14
Original CVE updated
2022-11-14
Advisory published
2022-11-14
Advisory updated
2022-11-14

Who should care

Windows administrators, endpoint security teams, vulnerability management teams, and incident responders should care most. Any environment that regularly receives or exchanges files from external or internet sources should treat this as a high-priority patch item.

Technical summary

The issue affects Windows MOTW handling and is categorized as a security feature bypass. The supplied sources do not describe a deeper root cause or exploit chain, but CISA’s KEV listing confirms known exploitation and instructs organizations to apply vendor updates. Treat it as a protection-bypass risk in Windows file trust handling.

Defensive priority

High / urgent. Because this CVE is in CISA KEV, it should be expedited through normal patch queues and validated across all supported Windows assets.

Recommended defensive actions

  • Apply Microsoft updates according to vendor guidance as soon as possible.
  • Prioritize all supported Windows systems in patch and exception workflows.
  • Confirm exposure across endpoints, servers, and remote-user devices that handle internet-originated files.
  • Review download, attachment, and file-exchange controls that rely on MOTW for protection decisions.
  • Track remediation status until fully deployed; treat KEV-listed systems as escalation candidates if patching is delayed.

Evidence notes

Source corpus includes the CVE record, NVD detail page, and CISA KEV catalog entry. CISA KEV metadata lists Microsoft Windows as the affected product, marks the issue as known exploited, and gives a due date of 2022-12-09. The supplied KEV metadata also directs organizations to apply updates per vendor instructions. No exploit mechanics beyond the title and catalog classification are supported by the provided sources.

Sources and references

Verified primary and authoritative sources

  • CVE-2022-41049 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2022-41049

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

  • CVE-2022-41049 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2022-41049

    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.