CVE-2021-27188Public exploitNetwork attack vector

Account lockout via repeated invalid logins

Published Feb 12, 2021 · Updated Aug 3, 2024

Denial of service in Sovremennye Delovye Tekhnologii FX Aggregator terminal client 1 allows remote attackers to suspend account access. The login flow counts any five failed credential submissions against the named account and automatically blocks that account for five hours. No valid credentials or user interaction are required; the bounded consequence is a five-hour login lockout for the targeted account.

CVSS severity7.5
High
EPSS probability1.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Sovremennye Delovye Tekhnologii FX Aggregator terminal client 1 allows remote attackers to suspend account access. The login flow counts any five failed credential submissions against the named account and automatically blocks that account for five hours. No valid credentials or user interaction are required; the bounded consequence is a five-hour login lockout for the targeted account.

The record

CVE
CVE-2021-27188
Published
Feb 12, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-307, T1531
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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:N/I:N/A:P
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-307Improper Restriction of Excessive Authentication Attempts
T1531Account Access Removal

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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