CVE-2026-69375
Microsoft Exchange Server Tampering Vulnerability
No known exploitation. EPSS puts it in the 51st percentile. Fixed versions are out.
No public exploit knownFix5 products4 fixed builds listed below
e.g. OID 1.3.6.1.4.1.25623.1.0.119496
What to do
Find your product and version, then upgrade to the build on the right.
- Microsoft Exchange Server 2016 Cumulative Update 23Affected: ≥ 15.01.0.0, < 15.01.2507.073Upgrade to: 15.01.2507.073Stated by: CVE record
- Microsoft Exchange Server 2019 Cumulative Update 14Affected: ≥ 15.02.0.0, < 15.02.1544.046Upgrade to: 15.02.1544.046Stated by: CVE record
- Microsoft Exchange Server 2019 Cumulative Update 15Affected: ≥ 15.02.0.0, < 15.02.1748.051Upgrade to: 15.02.1748.051Stated by: CVE record
- Microsoft Exchange Server Subscription Edition RTMAffected: ≥ 15.02.0.0, < 15.02.2562.049Upgrade to: 15.02.2562.049Stated by: CVE record
- Microsoft Exchange Server Subscription EditionAffected: < 15.02.2562.049Upgrade to: 15.02.2562.049Stated by: NVD
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
Authorization bypass through user-controlled key in Microsoft Exchange Server allows an authorized attacker to perform tampering over a network.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.6% chance of exploitation activity in the next 30 days, which ranks it in the 51st percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
8 events over 21 days, from the signal feeds we watch.
- Patch availablerecord updated
- OpenVAS check addedrecord updated
- Publishedweakness classified, att&ck mapped, record updated
Affected products
- exchange serverOperating Systems / windows
- exchange server subscription editionEnterprise Software / itsm-monitoring
- Microsoft Exchange Server 2016 Cumulative Update 23Operating Systems
- Microsoft Exchange Server 2019 Cumulative Update 14Operating Systems / windows
- Microsoft Exchange Server 2019 Cumulative Update 15Enterprise Software / itsm-monitoring
- Microsoft Exchange Server Subscription Edition RTMEnterprise Software / itsm-monitoring
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Scored 6.5 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality NoneNo confidentiality impact
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1078Valid Accountshigh confidence
Sources
References in the record
In the news
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