High 7.5Published Jan 16, 2026

CVE-2021-47827WebSSH for iOS 14.16.10 - 'mashREPL' Denial of Service

Updated under an hour ago (Oct 27, 2026, 3:40 PM ET)

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Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-1284
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Jan 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

WebSSH WebSSH for iOS webssh:for_ios (from the name)	14.16.10	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.