AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2021-26777

CRITICAL · CVSS 9.8 EPSS 2.44% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-12-02 · 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.

GitHub PoC Links
github.com ↗

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

CVE
CVE-2021-26777
Severity
CRITICAL
CVSS
9.8
EPSS
2.44%

Original NVD Description

Buffer overflow vulnerability in function SetFirewall in index.cgi in CIRCUTOR COMPACT DC-S BASIC smart metering concentrator Firwmare version CIR_CDC_v1.2.17, allows attackers to execute arbitrary code.