VulnerabilityPublished 10 Nov 2021Updated 30 May 2025

CVE-2021-42111: An issue was discovered in the RCDevs OpenOTP app 1.4.13 and 1.4.14 for iOS

Source CVE Database V5

Not known to be exploited · CVSS 5.5 Medium.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score

5.5Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 15% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AC:L/AV:L/A:N/C:H/I:N/PR:L/S:U/UI:N

Attack Complexity: Low
Attack Vector: Local
Availability: None
Confidentiality: High
Integrity: None
Privileges Required: Low
Scope: Unchanged
User Interaction: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
Availability: None: There is no impact to availability within the impacted component.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 10 Nov 2021
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
n/a n/a	Affected =1.4.13 =1.4.14	Fixed in–

AI-suggested

European organizations should enforce strict mobile device management (MDM) policies that prohibit jailbreaking of corporate or BYOD iOS devices. Devices found to be jailbroken should be quarantined or removed from accessing corporate resources. Organizations should ensure that all users update the RCDevs OpenOTP iOS app to version 1.4.1631262629 or later, which addresses the vulnerability by securely hashing the PIN code. Additionally, organizations should implement continuous monitoring for jailbroken devices and educate users on the security risks of jailbreaking. Employing endpoint detection and response (EDR) solutions that can detect jailbreak indicators will further reduce risk. Finally, organizations should consider additional layers of authentication or device attestation mechanisms to ensure device integrity before allowing access to sensitive systems.

Description

An issue was discovered in the RCDevs OpenOTP app 1.4.13 and 1.4.14 for iOS. If it is installed on a jailbroken device, it is possible to retrieve the PIN code used to access the application. The IOS app version 1.4.1631262629 resolves this issue by storing a hash PIN code.

Impact

For European organizations using the RCDevs OpenOTP iOS app, this vulnerability poses a confidentiality risk to the authentication PIN if devices are jailbroken. The PIN compromise could allow attackers to bypass multi-factor authentication protections, potentially leading to unauthorized access to sensitive enterprise resources. However, the impact is mitigated by the requirement that the device must be jailbroken, which is generally discouraged and less common in corporate environments due to security policies. Organizations with lax device management or BYOD policies where jailbreaking is more prevalent are at higher risk. The confidentiality breach could lead to unauthorized access to corporate networks, sensitive data exposure, and potential lateral movement within the network. Given the medium CVSS score and the limited attack vector, the overall risk is moderate but should not be ignored, especially in sectors with high security requirements such as finance, government, and critical infrastructure. The absence of known exploits in the wild reduces immediate threat but patching remains critical to prevent future exploitation.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 8 Jul 2025, 15:40 UTC

Technical details

References

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