AUGUST 4, 2026
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Case File

CVE-2021-26634

CRITICAL · CVSS 9.8 EPSS 1.25% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2022-06-02 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
arbitrary code execution code execution

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-26634
Severity
CRITICAL
CVSS
9.8
EPSS
1.25%

Original NVD Description

SQL injection and file upload attacks are possible due to insufficient validation of input values in some parameters and variables of files compromising Maxboard, which may lead to arbitrary code execution or privilege escalation. Attackers can use these vulnerabilities to perform attacks such as stealing server management rights using a web shell.