How severe is CVE-2021-27188?

CVE-2021-27188 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-27188 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27188?

CVE-2021-27188 affects Xn--b1agzlht Fx Aggregator Terminal Client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27188?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-27188 published?

CVE-2021-27188 was published on 2021-02-12 and last updated on 2026-06-17.

CVE-2021-27188

CVE-2021-27188 is a high-severity vulnerability in Xn--b1agzlht Fx Aggregator Terminal Client with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-307.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-307
Affected product: Xn--b1agzlht Fx Aggregator Terminal Client
Published: 2021-02-12
Last modified: 2026-06-17

Description

The Sovremennye Delovye Tekhnologii FX Aggregator terminal client 1 allows attackers to cause a denial of service (access suspended for five hours) by making five invalid login attempts to a victim's account.

Frequently asked questions

What is CVE-2021-27188?: The Sovremennye Delovye Tekhnologii FX Aggregator terminal client 1 allows attackers to cause a denial of service (access suspended for five hours) by making five invalid login attempts to a victim's account.
How severe is CVE-2021-27188?: CVE-2021-27188 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-27188 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27188?: CVE-2021-27188 affects Xn--b1agzlht Fx Aggregator Terminal Client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27188?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-27188 published?: CVE-2021-27188 was published on 2021-02-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:xn--b1agzlht:fx_aggregator_terminal_client:1.0:*:*:*:*:*:*:*

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