How severe is CVE-2021-44751?

CVE-2021-44751 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-44751 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44751?

CVE-2021-44751 affects F-secure Safe. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44751?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-44751 published?

CVE-2021-44751 was published on 2022-03-25 and last updated on 2026-06-17.

CVE-2021-44751

CVE-2021-44751 is a medium-severity vulnerability in F-secure Safe with a CVSS 3.x base score of 4.3. 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-276.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-276
Affected product: F-secure Safe
Published: 2022-03-25
Last modified: 2026-06-17

Description

A vulnerability affecting F-Secure SAFE browser was discovered. A maliciously crafted website attached with USSD code in JavaScript or iFrame can trigger dialer application from F-Secure browser which can be exploited by an attacker to send unwanted USSD messages or perform unwanted calls. In most modern Android OS, dialer application will require user interaction, however, some older Android OS may not need user interaction.

Frequently asked questions

What is CVE-2021-44751?: A vulnerability affecting F-Secure SAFE browser was discovered. A maliciously crafted website attached with USSD code in JavaScript or iFrame can trigger dialer application from F-Secure browser which can be exploited by an attacker to send unwanted USSD messages or perform unwanted calls. In most modern Android OS, dialer application will require user interaction, however, some older Android OS may not need user interaction.
How severe is CVE-2021-44751?: CVE-2021-44751 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-44751 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44751?: CVE-2021-44751 affects F-secure Safe. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44751?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-44751 published?: CVE-2021-44751 was published on 2022-03-25 and last updated on 2026-06-17.

References

https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame

Affected products (1)

cpe:2.3:a:f-secure:safe:*:*:*:*:*:android:*:*

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