How severe is CVE-2021-44201?

CVE-2021-44201 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-44201 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44201?

CVE-2021-44201 primarily affects Acronis Cyber Protect. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-44201?

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

When was CVE-2021-44201 published?

CVE-2021-44201 was published on 2021-11-29 and last updated on 2026-06-17.

CVE-2021-44201

CVE-2021-44201 is a medium-severity vulnerability in Acronis Cyber Protect with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Acronis Cyber Protect
Published: 2021-11-29
Last modified: 2026-06-17

Description

Cross-site scripting (XSS) was possible in notification pop-ups. The following products are affected: Acronis Cyber Protect 15 (Windows, Linux) before build 28035

Frequently asked questions

What is CVE-2021-44201?: Cross-site scripting (XSS) was possible in notification pop-ups. The following products are affected: Acronis Cyber Protect 15 (Windows, Linux) before build 28035
How severe is CVE-2021-44201?: CVE-2021-44201 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-44201 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44201?: CVE-2021-44201 primarily affects Acronis Cyber Protect. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-44201?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-44201 published?: CVE-2021-44201 was published on 2021-11-29 and last updated on 2026-06-17.

References

https://security-advisory.acronis.com/advisories/SEC-3167

Affected products (4)

cpe:2.3:a:acronis:cyber_protect:*:*:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_protect:15:-:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_protect:15:update1:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_protect:15:update2:*:*:*:*:*:*

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