CVE-2021-42255

CVE-2021-42255 is a high-severity vulnerability in Blueplanet-works Appguard 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-668.

Key facts

Description

AppGuard Enterprise before 6.7.100.1 creates a Temporary File in a Directory with Insecure Permissions. Local users can gain SYSTEM privileges because a repair operation relies on the %TEMP% directory of an unprivileged user.

Frequently asked questions

What is CVE-2021-42255?
AppGuard Enterprise before 6.7.100.1 creates a Temporary File in a Directory with Insecure Permissions. Local users can gain SYSTEM privileges because a repair operation relies on the %TEMP% directory of an unprivileged user.
How severe is CVE-2021-42255?
CVE-2021-42255 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-2021-42255 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42255?
CVE-2021-42255 affects Blueplanet-works Appguard. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42255?
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.
When was CVE-2021-42255 published?
CVE-2021-42255 was published on 2022-04-12 and last updated on 2026-06-17.

References

Affected products (1)

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