PatchTheCVECVE-2026-27543: Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.
CVE-2026-27543 is a high-severity flaw (CVSS 8.1) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.1 (High) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 70%) |
| CISA exploited list | No |
| Weakness | CWE-266 |
| Published | 2026-08-13 |
| Last modified | 2026-10-23 |
Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
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-2026-27543?
No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.
Is CVE-2026-27543 being exploited?
CVE-2026-27543 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-2026-27543 affect?
CVE-2026-27543 affects affected software. Severity is high (CVSS 8.1). Unauthenticated Privilege Escalation in MStore API <= 4.20.0 versions.
How urgent is CVE-2026-27543?
Priority 41/100. High severity; Remotely exploitable, no login, no user action