MEDIUM

CVE-2026-33857

CVSS v3

5.3

MEDIUM

EPSS Score

0.1%

exploit probability

CISA KEV

known exploited

Exploitation

—

SSVC status

Description

Microsoft Security Update (CVE-2026-33857)

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Published: 5/7/2026
MSRC Title: Apache HTTP Server: Off-by-one OOB reads in AJP getter functions

Frequently asked questions

What is CVE-2026-33857?

Microsoft Security Update (CVE-2026-33857)

Is CVE-2026-33857 actively exploited?

Active exploitation of CVE-2026-33857 has not been confirmed. The EPSS score is 0.1%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-33857?

CVE-2026-33857 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Is CVE-2026-33857 affecting your environment?

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