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No exploitation reportedAwaiting NVD analysis

CVE-2026-118157

Microsoft Exchange Server Elevation of Privilege Vulnerability

No exploitation reported by the sources we read.

  • Published2026-11-10
  • WeaknessCWE-1390

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Weak authentication in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Timeline

dates in UTC
  1. 2026-11-1018:21CVE publishedCNA

Versions per branch

Products declared by the CNA

As microsoft, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • Microsoft Exchange Server Subscription Edition RTM

    platforms: x64-based Systems

    Affected
    • ≥ 15.02.0.0, < 15.02.2562.057fixed in 15.02.2562.057custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-10

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-118157 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionnone2026-11-10
  • CNACVSS 3.17.22026-11-10
  • NVDCVSS 3.17.2read 2026-11-10
  • CNAweakness (CWE)CWE-13902026-11-10
  • NVDweakness (CWE)CWE-1390read 2026-11-10

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published
2026-11-10
Last Modified
2026-11-10
NVD status
Awaiting Analysis

Frequently asked questions

What is CVE-2026-118157?

Weak authentication in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Is CVE-2026-118157 actively exploited?

Active exploitation of CVE-2026-118157 has not been confirmed.

What is the CVSS score for CVE-2026-118157?

CVE-2026-118157 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

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