CVE-2021-47827

WebSSH for iOS 14.16.10 - 'mashREPL' Denial of Service

CVSS 4.6 MEDIUMEPSS 0.4%CWE-1284

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.6EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

16 Jan 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Affected products

WebSSH · WebSSH for iOS

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References

https://apps.apple.com/mx/app/webssh-ssh-client/id497714887 https://www.exploit-db.com/exploits/49883 https://www.vulncheck.com/advisories/webssh-for-ios-mashrepl-denial-of-service