AUGUST 4, 2026
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Case File

CVE-2021-43825

MEDIUM · CVSS 6.1 EPSS 0.88% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2022-02-22 · 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.

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

CVE
CVE-2021-43825
Severity
MEDIUM
CVSS
6.1
EPSS
0.88%

Original NVD Description

Envoy is an open source edge and service proxy, designed for cloud-native applications. Sending a locally generated response must stop further processing of request or response data. Envoy tracks the amount of buffered request and response data and aborts the request if the amount of buffered data is over the limit by sending 413 or 500 responses. However when the buffer overflows while response is processed by the filter chain the operation may not be aborted correctly and result in accessing a freed memory block. If this happens Envoy will crash resulting in a denial of service.