CVE-2025-53782

HIGH

Published Oct 14, 2025 Modified Oct 27, 2025 CWE-303

Description

Incorrect implementation of authentication algorithm in Microsoft Exchange Server allows an unauthorized attacker to elevate privileges locally.

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CVSS v3.1 Score

8.4

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-303 CWE-303

Affected Products

Vendor	Product	Versions
microsoft	exchange_server	< 15.02.2562.029
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All
microsoft	exchange_server	All

References

Advisories & Patches

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53782

Frequently Asked Questions

What is CVE-2025-53782? +

Incorrect implementation of authentication algorithm in Microsoft Exchange Server allows an unauthorized attacker to elevate privileges locally. It has a CVSS v3.1 base score of 8.4 (HIGH).

How severe is CVE-2025-53782? +

CVE-2025-53782 has a CVSS v3.1 score of 8.4 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-53782? +

CVE-2025-53782 affects products from microsoft, specifically: exchange_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-53782? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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