Security readout for executives and security teams
Plain-English summary
This flaw could let a remote, unauthenticated attacker falsify information handled by the Windows Printing Service. Successful exploitation could compromise data integrity without requiring user interaction, potentially undermining trust in printing-related activity. The supplied evidence rates it high severity but does not establish active exploitation.
Executive priority
Treat this as a high-priority patching issue, especially where Windows printing services are reachable across network boundaries. The integrity impact and unauthenticated, no-interaction vector justify prompt action. Current evidence does not support declaring an emergency based on active exploitation alone.
Technical view
CVE-2024-21406 is a Windows Printing Service spoofing vulnerability associated with cleartext transmission of sensitive information (CWE-319). Its CVSS 3.1 score is 7.5: network-accessible, low complexity, no privileges or user interaction required, with high integrity impact but no stated confidentiality or availability impact.
Likely exposure
Exposure includes the listed Windows 10, Windows 11, and Windows Server releases where the applicable Microsoft security update has not been installed. The bundle does not identify required service configuration, reachable ports, specific vulnerable components, or environmental prerequisites, so organizations should validate applicability using Microsoft’s advisory.
Exploitation context
The vector indicates remote, unauthenticated exploitation with low complexity and no user interaction. However, the supplied bundle marks this CVE as absent from KEV and provides no cited evidence of exploitation in the wild or public exploit availability. Absence from KEV does not prove that exploitation has never occurred.
Researcher notes
The supplied record provides a score, vector, affected-release list, CWE classification, and vendor patch reference, but little root-cause detail. Validate exact build applicability and remediation through MSRC. Do not infer confidentiality impact, availability impact, public exploit maturity, or exploitation prerequisites beyond the documented vector.
Mitigation direction
- Review the Microsoft advisory and install the applicable security update for every affected Windows release.
- Prioritize externally reachable, shared, or business-critical Windows printing systems.
- Use Microsoft guidance to identify any supported mitigations when immediate patching is impossible.
- Restrict unnecessary network access to printing services while remediation is pending.
Validation and detection
- Inventory the listed Windows client and server releases, including Server Core installations.
- Compare each system’s update state with the remediation information in Microsoft’s advisory.
- Confirm printing-service network exposure and document systems reachable from untrusted networks.
- Re-scan or reassess affected assets after updating to verify the vulnerability is no longer reported.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-319: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2024-21406 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C3.93.6microsoftVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- Windows Printing Service Spoofing VulnerabilityCVE reference, microsoft · vendor-advisory, patch
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Cleartext Transmission of Sensitive Information
Cleartext Transmission of Sensitive Information represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.