How severe is CVE-2021-44199?

CVE-2021-44199 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-44199 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44199?

CVE-2021-44199 primarily affects Acronis Agent. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-44199?

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

When was CVE-2021-44199 published?

CVE-2021-44199 was published on 2021-11-29 and last updated on 2026-06-17.

CVE-2021-44199

CVE-2021-44199 is a medium-severity vulnerability in Acronis Agent 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-427.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 1.9
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-427
Affected product: Acronis Agent
Published: 2021-11-29
Last modified: 2026-06-17

Description

DLL hijacking could lead to denial of service. The following products are affected: Acronis Cyber Protect 15 (Windows) before build 28035, Acronis Agent (Windows) before build 27305, Acronis Cyber Protect Home Office (Windows) before build 39612

Frequently asked questions

What is CVE-2021-44199?: DLL hijacking could lead to denial of service. The following products are affected: Acronis Cyber Protect 15 (Windows) before build 28035, Acronis Agent (Windows) before build 27305, Acronis Cyber Protect Home Office (Windows) before build 39612
How severe is CVE-2021-44199?: CVE-2021-44199 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-44199 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44199?: CVE-2021-44199 primarily affects Acronis Agent. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-44199?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-44199 published?: CVE-2021-44199 was published on 2021-11-29 and last updated on 2026-06-17.

References

https://security-advisory.acronis.com/advisories/SEC-2508

Affected products (6)

cpe:2.3:a:acronis:agent:-:*:*:*:*:*:*:*
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:*:*:*:*:*:*
cpe:2.3:a:acronis:cyber_protect_home_office:-:*:*:*:*:*:*:*

More vulnerabilities in Acronis Agent

CVE-2026-28727 — High (CVSS 7.8): Local privilege escalation due to insecure Unix socket permissions. The following products are affected: Acronis Cyber…
CVE-2023-44209 — High (CVSS 7.8): Local privilege escalation due to improper soft link handling. The following products are affected: Acronis Cyber…
CVE-2023-41744 — High (CVSS 7.8): Local privilege escalation due to unrestricted loading of unsigned libraries. The following products are affected:…
CVE-2023-41743 — High (CVSS 7.8): Local privilege escalation due to insecure driver communication port permissions. The following products are affected:…
CVE-2022-45451 — High (CVSS 7.8): Local privilege escalation due to insecure driver communication port permissions. The following products are affected:…
CVE-2022-45452 — High (CVSS 7.8): Local privilege escalation due to insecure folder permissions. The following products are affected: Acronis Agent…

All CVEs affecting Acronis Agent →

Other CWE-427 (Uncontrolled Search Path Element) vulnerabilities

CVE-2025-4981 — Critical (CVSS 9.9): Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to…
CVE-2025-69599 — Critical (CVSS 9.8): RayVentory Scan Engine through 12.6 Update 8 allows attackers to gain privileges if they control the value of the PATH…
CVE-2019-25268 — Critical (CVSS 9.8): NREL BEopt 2.8.0.0 contains a DLL hijacking vulnerability that allows attackers to load arbitrary libraries by tricking…
CVE-2023-53959 — Critical (CVSS 9.8): FileZilla Client 3.63.1 contains a DLL hijacking vulnerability that allows attackers to execute malicious code by…
CVE-2025-65741 — Critical (CVSS 9.8): Sublime Text 3 Build 3208 or prior for MacOS is vulnerable to Dylib Injection. An attacker could compile a .dylib file…
CVE-2024-23054 — Critical (CVSS 9.8): An issue in Plone Docker Official Image 5.2.13 (5221) open-source software that could allow for remote code execution…

Browse all CWE-427 (Uncontrolled Search Path Element) vulnerabilities →