CVE-2026-45498
Description
Microsoft Defender Denial of Service Vulnerability
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Microsoft Defender is vulnerable to a denial of service condition, and CISA has added it to the Known Exploited Vulnerabilities catalog.
Vulnerability
The official description states that Microsoft Defender contains a denial of service vulnerability. No further technical details, affected versions, or required conditions are disclosed in the available references [1].
Exploitation
The CISA Known Exploited Vulnerabilities Catalog lists this CVE, indicating that exploitation has been observed in the wild [1]. However, the specific attack vector, prerequisites, or exploitation steps are not described in the provided reference.
Impact
Successful exploitation could lead to a denial of service condition affecting Microsoft Defender. The exact impact on system availability or other CIA aspects is not detailed in the available sources [1].
Mitigation
As of the publication date (2026-05-20), the vulnerability is listed in CISA's Known Exploited Vulnerabilities Catalog, which typically requires federal agencies to apply mitigations or patches by a specified due date [1]. No specific fixed version or workaround is mentioned in the reference. Users should consult Microsoft's official security advisories for remediation guidance.
AI Insight generated on May 21, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45498nvdVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalognvdThird Party AdvisoryUS Government Resource