CVE-2026-49160
Published: 09 June 2026
Summary
CVE-2026-49160 is a high-severity Uncontrolled Resource Consumption (CWE-400) vulnerability in Microsoft Windows 10 21H2. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 42.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2026-49160 is an uncontrolled resource consumption vulnerability, tracked under CWE-400, that affects HTTP/2 implementations. The flaw permits excessive resource use during network interactions and carries a CVSS 3.1 score of 7.5, reflecting network attack vector, low complexity, and no required privileges or user interaction, with high impact solely on availability.
An unauthenticated attacker can send crafted HTTP/2 traffic over the network to trigger the condition, resulting in denial of service against the targeted service or system.
Microsoft has published an advisory for CVE-2026-49160 that addresses the issue. The associated EPSS score has remained flat at 0.0123 with no material increase since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-35588
Vulnerability details
Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Limiting concurrent sessions directly prevents uncontrolled resource consumption by capping the number of active sessions per user or account.
Analysis identifies uncontrolled resource consumption indicative of denial-of-service or abuse attempts.
Contingency plan testing includes resource exhaustion scenarios to verify recovery, making it harder for attackers to sustain exploits that cause uncontrolled consumption.
Updated contingency plans include current procedures to detect, contain, and recover from resource exhaustion, limiting an attacker's ability to sustain impact from uncontrolled consumption.
Alternate site allows resumption of operations if resource exhaustion at the primary site is exploited to cause unavailability.
Alternate telecommunications services enable resumption of essential functions when primary services become unavailable due to uncontrolled resource consumption.
The team can analyze and respond to resource exhaustion incidents, reducing the impact of attacks that exploit uncontrolled consumption weaknesses.
Timely maintenance support and spare parts enable rapid recovery from failures induced by uncontrolled resource consumption, shortening the impact window of denial-of-service attacks.