Vulnerability · Published Jan 16, 2026 · Assigned by VulnCheck
CVE-2021-47827WebSSH for iOS 14.16.10 - 'mashREPL' Denial of Service
High 7.5
In plain English
A high-severity security flaw in WebSSH for iOS from WebSSH. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 61.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WebSSH | WebSSH for iOS | 14.16.10 |
Weakness: CWE-1284 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- ExploitDB-49883 exploit
- WebSSH iOS App Store Page product
- VulnCheck Advisory: WebSSH for iOS 14.16.10 - 'mashREPL' Denial of Service third-party-advisory