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Case File

CVE-2016-4537

CRITICAL · CVSS 9.8 EPSS 5.87%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2016-05-22 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. It may be remotely exploitable. It may lead to a denial-of-service condition.

CVE
CVE-2016-4537
Severity
CRITICAL
CVSS
9.8
EPSS
5.87%

Original NVD Description

The bcpowmod function in ext/bcmath/bcmath.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x before 7.0.6 accepts a negative integer for the scale argument, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted call.