CVE-2020-27020Public exploitNetwork attack vector

Password prediction via time-seeded pseudorandom generation

Published May 14, 2021 · Updated Aug 4, 2024

Weak password generation in Kaspersky Password Manager allows attackers to predict passwords created by affected Windows, Android, and iOS releases. The generator seeds a noncryptographic Mersenne Twister with the current system time in seconds, reducing each character-policy search space to one candidate per second. Attackers need to know that a password came from the product and its approximate generation time; the published proof of concept recovers Windows-generated passwords by testing the resulting candidate set.

CVSS severity7.5
High
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak password generation in Kaspersky Password Manager allows attackers to predict passwords created by affected Windows, Android, and iOS releases. The generator seeds a noncryptographic Mersenne Twister with the current system time in seconds, reducing each character-policy search space to one candidate per second. Attackers need to know that a password came from the product and its approximate generation time; the published proof of concept recovers Windows-generated passwords by testing the resulting candidate set.

The record

CVE
CVE-2020-27020
Published
May 14, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-326, T1110.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2021CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-326Inadequate Encryption Strength
T1110.002Password Cracking

Public exploit references

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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