Security readout for executives and security teams
Plain-English summary
CVE-2019-0941 can let an authenticated local attacker cause a temporary outage on IIS pages that use the optional request filtering feature. The business impact is service disruption, not data theft, based on the provided sources.
Executive priority
Handle through normal patch governance unless the affected IIS service supports a critical business process. Escalate if exposed request-filtered pages are customer-facing or outage tolerance is low.
Technical view
Microsoft describes improper request handling in IIS Server request filtering. A specially crafted request to a page using request filtering can trigger temporary denial of service. The listed CVSS v3.1 vector is AV:L/PR:L/UI:N with low integrity and availability impact, and Microsoft says the update changes request processing by the filter.
Likely exposure
Exposure is limited to affected Microsoft Windows/IIS systems from the source list where IIS pages are configured to use request filtering. Systems without IIS request filtering use for served pages are less likely to be exposed.
Exploitation context
The bundle does not show CISA KEV listing or evidence of active exploitation. CVSS includes exploit code maturity as proof-of-concept, but no exploit details are provided here. Do not treat this as actively exploited without additional evidence.
Researcher notes
Evidence is sufficient for affected platform scope, vulnerability class, and vendor remediation direction. The source text is sparse on exact vulnerable request patterns, so validation should avoid exploit reproduction and focus on configuration and patch state.
Mitigation direction
- Apply the Microsoft security update for CVE-2019-0941.
- Prioritize IIS hosts serving request-filtered pages on listed Windows versions.
- Check current Microsoft guidance for supersedence and supported update paths.
- Reduce exposure of request-filtered IIS pages where business impact allows.
Validation and detection
- Inventory IIS servers on affected Windows versions listed in the bundle.
- Confirm whether IIS request filtering is enabled for public or critical pages.
- Verify the CVE-2019-0941 Microsoft update is installed or superseded.
- Review monitoring for unexplained temporary IIS page outages.
Public sources used
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.
CVE-2019-0941 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
- Medium
- CVSS
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/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.
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:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/RL:O/RC:C1.82.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Microsoft IIS Server Denial of Service VulnerabilityCVE reference · vendor-advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0941CVE reference · x_refsource_MISC, x_transferred
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.