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CVE-2021-26857

Deserialization of Untrusted Data — is CVE-2021-26857real, exploitable, or a false positive? Here's the community ground truth.

High · CVSS 7.8EPSS 94.0%CISA KEVCWE-502 · Deserialization of Untrusted Data

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

Microsoft Exchange Server Remote Code Execution Vulnerability

NVD only has a brief summary for this one — the community fills in the real-world detail below.

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TruePositive verdict for CVE-2021-26857
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Community ground truth

Community verdict

2 verdicts
Not a real issue

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Community real-world severity: Critical (Critical 2) — CVSS base score 7.8

Practitioners rate this higher than its CVSS — treat with extra caution.

Field notes & remediation

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    Same weaknessCWE-502 · Deserialization of Untrusted Data.