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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.

PUBLISHED Reserved 2026-01-14 | Published 2026-01-16 | Updated 2026-01-16 | Assigner VulnCheck




MEDIUM: 4.6CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Improper Validation of Specified Quantity in Input

Product status

14.16.10
affected

Credits

Luis Martinez finder

References

www.exploit-db.com/exploits/49883 (ExploitDB-49883) exploit

apps.apple.com/mx/app/webssh-ssh-client/id497714887 (WebSSH iOS App Store Page) product

www.vulncheck.com/...bssh-for-ios-mashrepl-denial-of-service (VulnCheck Advisory: WebSSH for iOS 14.16.10 - 'mashREPL' Denial of Service) third-party-advisory

cve.org (CVE-2021-47827)

nvd.nist.gov (CVE-2021-47827)

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