CVE-2026-118153 json
Microsoft Exchange Server Denial of Service Vulnerability
published yesterday modified 17h ago also EUVD-2026-122244
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 70%
- public exploits
- 0
- none known
Summary
Inefficient algorithmic complexity in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network.
Patch / fix
- Microsoft Microsoft Exchange Server Subscription Edition RTM 15.02.2562.057
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- yesterday
Exploit prediction
1.30% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- Microsoft Microsoft Exchange Server Subscription Edition RTM
Classification
- Weakness
-
- CWE-407 Inefficient Algorithmic Complexity
- Technology feeds
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-118153
vendor-advisory, patch
Sources
- CVE List CVE-2026-118153
- NVD CVE-2026-118153
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