CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-118153 Microsoft Exchange Server Denial of Service Vulnerability
High (7.5) in microsoft microsoft exchange server subscription edition rtm. EPSS 1.3% estimated probability of exploitation activity in the next 30 days.
Inefficient algorithmic complexity in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network.
Severity
- EPSS
- 1.3% estimated probability of exploitation activity in the next 30 days; 71st percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: yes · Technical impact: partial, assessed 2026-11-10. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-407 Inefficient Algorithmic Complexity
- Published
- Modified
- Assigned by
- microsoft (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
- microsoft:microsoft exchange server subscription edition rtm
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Microsoft Exchange Server Subscription Edition RTM | from 15.02.0.0 before 15.02.2562.057 |