CVE-2021-42111

PIN disclosure via retrievable local storage

Published Nov 10, 2021 · Updated May 30, 2025

Insecure PIN storage in RCDevs OpenOTP for iOS 1.4.13 and 1.4.14 allows local users to retrieve the application PIN. The app stores the PIN in a directly retrievable form rather than as a hash, exposing the secret through local application data. Exploitation requires a jailbroken iOS device and low-privileged local access; the disclosed impact is limited to PIN confidentiality.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insecure PIN storage in RCDevs OpenOTP for iOS 1.4.13 and 1.4.14 allows local users to retrieve the application PIN. The app stores the PIN in a directly retrievable form rather than as a hash, exposing the secret through local application data. Exploitation requires a jailbroken iOS device and low-privileged local access; the disclosed impact is limited to PIN confidentiality.

The record

CVE
CVE-2021-42111
Published
Nov 10, 2021
Updated
May 30, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1634
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 10, 2021CVE publishedPublication date reported by the CVE source.
  2. May 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

2.1NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
5.5MITRECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1634Credentials from Password Store

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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