CVE-2021-41993

Offline MFA bypass via pre-computed RSA dictionary attacks

Published Apr 30, 2022 · Updated Aug 4, 2024

Cryptographic misconfiguration in PingID Mobile Application before 1.19 allows attackers to bypass offline MFA through PingID Windows Login. The Android app's RSA configuration enables pre-computed dictionary attacks against cryptographic material used to validate offline authentication attempts. Physical access and high privileges are required; recovering valid offline authentication material defeats the second-factor check and permits unauthorized login.

CVSS severity6.6
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cryptographic misconfiguration in PingID Mobile Application before 1.19 allows attackers to bypass offline MFA through PingID Windows Login. The Android app's RSA configuration enables pre-computed dictionary attacks against cryptographic material used to validate offline authentication attempts. Physical access and high privileges are required; recovering valid offline authentication material defeats the second-factor check and permits unauthorized login.

The record

CVE
CVE-2021-41993
Published
Apr 30, 2022
Updated
Aug 4, 2024
Vendor
Ping Identity
Product
PingID Mobile Application
Classifications
CWE-310, CWE-330, T1110.002
Attack vector
physical
Privileges
admin

Timeline

How it unfolded

  1. Apr 30, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <1.19

What conditions does exploitation require?

Attack vectorphysical
Required privilegesadmin

What is affected?

Ping Identity · PingID Mobile Applicationversion=unspecified <1.19

Published CVSS scores

4.8NIST National Vulnerability DatabaseCVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
1.9NIST National Vulnerability DatabaseAV:L/AC:M/Au:N/C:P/I:N/A:N
6.6Ping IdentityCVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:C/C:H/I:H/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)
Vectorphysical
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-310Cryptographic Issues
CWE-330Use of Insufficiently Random Values
T1110.002Password Cracking

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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