CVE-2021-47827

HIGH

WebSSH for iOS 14.16.10 - Denial of Service via MashREPL Input Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47827. PoCs published by Luis Martínez.

AI-analyzed exploit summary This exploit is a simple Denial of Service (DoS) PoC for WebSSH for iOS version 14.16.10. It generates a buffer of 300 'A' characters which, when pasted into the 'mashREPL' tool within the app, causes a crash.

Description

WebSSH for iOS 14.16.10 contains a denial of service vulnerability in the mashREPL tool that allows attackers to crash the application by pasting malformed input. Attackers can trigger the vulnerability by copying a 300-character buffer of repeated 'A' characters into the mashREPL input field, causing the application to crash.

Exploits (1)

exploitdb WORKING POC
by Luis Martínez · pythondosios
https://www.exploit-db.com/exploits/49883

This exploit is a simple Denial of Service (DoS) PoC for WebSSH for iOS version 14.16.10. It generates a buffer of 300 'A' characters which, when pasted into the 'mashREPL' tool within the app, causes a crash.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: WebSSH for iOS 14.16.10
No auth needed
Prerequisites: Access to the target iOS device · WebSSH for iOS installed · Ability to run Python script and copy output to clipboard
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/49883

Scores

CVSS v3 7.5
EPSS 0.0040
EPSS Percentile 31.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-1284
Status published
Published Jan 16, 2026
Tracked Since Feb 18, 2026