How severe is CVE-2021-47862?

CVE-2021-47862 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-47862 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2021-47862?

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.

Does CVE-2021-47862 have an EU (EUVD) identifier?

Yes. CVE-2021-47862 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3612.

When was CVE-2021-47862 published?

CVE-2021-47862 was published on 2026-01-21 and last updated on 2026-06-17.

CVE-2021-47862

CVE-2021-47862 is a high-severity vulnerability with a CVSS 3.x base score of 7.8. 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-428.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v4: 8.5
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3612
Weakness: CWE-428
Published: 2026-01-21
Last modified: 2026-06-17

Description

Hi-Rez Studios 5.1.6.3 contains an unquoted service path vulnerability in the HiPatchService that allows local attackers to execute code with elevated privileges. Attackers can exploit the unquoted path during system startup or reboot to inject and run malicious executables with LocalSystem permissions.

Frequently asked questions

What is CVE-2021-47862?: Hi-Rez Studios 5.1.6.3 contains an unquoted service path vulnerability in the HiPatchService that allows local attackers to execute code with elevated privileges. Attackers can exploit the unquoted path during system startup or reboot to inject and run malicious executables with LocalSystem permissions.
How severe is CVE-2021-47862?: CVE-2021-47862 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-47862 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2021-47862?: 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.
Does CVE-2021-47862 have an EU (EUVD) identifier?: Yes. CVE-2021-47862 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3612.
When was CVE-2021-47862 published?: CVE-2021-47862 was published on 2026-01-21 and last updated on 2026-06-17.

References

Other CWE-428 vulnerabilities

CVE-2022-50935 — Critical (CVSS 9.8): Flame II HSPA USB Modem contains an unquoted service path vulnerability in its Windows service configuration. Attackers…
CVE-2023-38408 — Critical (CVSS 9.8): The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to…
CVE-2022-36344 — Critical (CVSS 9.8): An unquoted search path vulnerability exists in 'JustSystems JUST Online Update for J-License' bundled with multiple…
CVE-2020-9292 — Critical (CVSS 9.8): An unquoted service path vulnerability in the FortiSIEM Windows Agent component may allow an attacker to gain elevated…
CVE-2019-17658 — Critical (CVSS 9.8): An unquoted service path vulnerability in the FortiClient FortiTray component of FortiClientWindows v6.2.2 and prior…
CVE-2019-8459 — Critical (CVSS 9.8): Check Point Endpoint Security Client for Windows, with the VPN blade, before version E80.83, starts a process without…

Browse all CWE-428 vulnerabilities →