PatchTheCVECVE-2021-42255: AppGuard Enterprise before 6.7.100.1 creates a Temporary File in a Directory with Insecure Permissions
CVE-2021-42255 is a high-severity flaw (CVSS 7.8) affecting appguard. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.8 (High) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 77%) |
| CISA exploited list | No |
| Weakness | CWE-668 |
| Published | 2022-04-12 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-42255?
appguard: upgrade to 6.7.100.1. Exact commands for each OS are on this page.
Is CVE-2021-42255 being exploited?
CVE-2021-42255 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-42255 affect?
CVE-2021-42255 affects appguard. Severity is high (CVSS 7.8). 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 urgent is CVE-2021-42255?
Priority 33/100. High severity