How severe is CVE-2021-44749?

CVE-2021-44749 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-44749 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44749?

CVE-2021-44749 affects F-secure Safe. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44749?

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

When was CVE-2021-44749 published?

CVE-2021-44749 was published on 2022-03-06 and last updated on 2026-06-17.

CVE-2021-44749

CVE-2021-44749 is a medium-severity vulnerability in F-secure Safe with a CVSS 3.x base score of 5.5. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: F-secure Safe
Published: 2022-03-06
Last modified: 2026-06-17

Description

A vulnerability affecting F-Secure SAFE browser protection was discovered improper URL handling can be triggered to cause universal cross-site scripting through browsing protection in a SAFE web browser. User interaction is required prior to exploitation. A successful exploitation may lead to arbitrary code execution.

Frequently asked questions

What is CVE-2021-44749?: A vulnerability affecting F-Secure SAFE browser protection was discovered improper URL handling can be triggered to cause universal cross-site scripting through browsing protection in a SAFE web browser. User interaction is required prior to exploitation. A successful exploitation may lead to arbitrary code execution.
How severe is CVE-2021-44749?: CVE-2021-44749 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-44749 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44749?: CVE-2021-44749 affects F-secure Safe. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44749?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-44749 published?: CVE-2021-44749 was published on 2022-03-06 and last updated on 2026-06-17.

References

https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-44749

Affected products (1)

cpe:2.3:a:f-secure:safe:18.5:*:*:*:*:android:*:*

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