CVE-2026-62911
HIGHCVSS 8/10
Last modified
CVE-2026-62911 is a high-severity vulnerability rated 8/10 on the CVSS scale. Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network..
Description
Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 23 | >= 15.01.0.0, < 15.01.2507.072 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 14 | >= 15.02.0.0, < 15.02.1544.044 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 15 | >= 15.02.0.0, < 15.02.1748.049 |
| Microsoft | Microsoft Exchange Server Subscription Edition RTM | >= 15.02.0.0, < 15.02.2562.046 |
References
Timeline
- Published
- Last Modified
- Status
- Undergoing Analysis
Frequently Asked Questions
What is CVE-2026-62911?
Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
How severe is CVE-2026-62911?
CVE-2026-62911 has a CVSS score of 8/10 (HIGH severity).
How do I fix CVE-2026-62911?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-62911?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST