AUGUST 4, 2026
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Case File

CVE-2021-21704

MEDIUM · CVSS 5 EPSS 1.85%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-10-04 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2021-21704
Severity
MEDIUM
CVSS
5
EPSS
1.85%

Original NVD Description

In PHP versions 7.3.x below 7.3.29, 7.4.x below 7.4.21 and 8.0.x below 8.0.8, when using Firebird PDO driver extension, a malicious database server could cause crashes in various database functions, such as getAttribute(), execute(), fetch() and others by returning invalid response data that is not parsed correctly by the driver. This can result in crashes, denial of service or potentially memory corruption.