CVE-2026-91843
CVSS v3
9.8
CRITICAL
EPSS Score
0.5 %
exploit probability, as of 2026-09-28
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges.
Technical details
- Published
- 2026-09-16
- Last Modified
- 2026-09-17
Frequently asked questions
What is CVE-2026-91843?
A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges.
Is CVE-2026-91843 actively exploited?
Active exploitation of CVE-2026-91843 has not been confirmed. Its EPSS score was 0.5% on 2026-09-28, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-91843?
CVE-2026-91843 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2026-91843 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
No credit card required · 500 free checks/month · Free API key
Other 2026 vulnerabilities worth triaging
Ranked by exploit probability (EPSS).
- CVE-2026-10520KEV
- CVE-2026-24061KEV
- CVE-2026-1281KEV
- CVE-2026-1340KEVUnauthenticated Remote Code Execution via Code Injection in Ivanti Endpoint Manager Mobile
- CVE-2026-41940KEV
- CVE-2026-23760KEVSmarterTools SmarterMail < Build 9511 Authentication Bypass via Password Reset API
- CVE-2026-21643KEVSQL Injection Vulnerability in FortiClientEMS 7.4.4 Allows Unauthenticated Remote Code Execution
- CVE-2026-20182KEV