AUGUST 4, 2026
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Case File

CVE-2021-39275

CRITICAL · CVSS 9.8 EPSS 39.40%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-09-16 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. It affects Apache. Its EPSS score suggests a 39.4% probability of exploitation in the next 30 days.

CVE
CVE-2021-39275
Severity
CRITICAL
CVSS
9.8
EPSS
39.40%
Apache

Original NVD Description

ap_escape_quotes() may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party / external modules may. This issue affects Apache HTTP Server 2.4.48 and earlier.

Related CVEs

Other vulnerabilities affecting the same vendor(s)