Answer in brief
CVE-2026-56719 records a Medium severity (CVSS 6.3) vulnerability in MikroTik RouterOS < 7.24 Out-of-Bounds Read via SMB1 SessionSetupAndX. The current sources do not mark it as known exploited. The current feed maps MikroTik/RouterOS (generic), MikroTik/RouterOS (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps MikroTik/RouterOS (generic), MikroTik/RouterOS (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| MikroTik/RouterOSgeneric | >=0 <=6.49.18 || >=7.0.0 <=7.11.2 | Not reported |
| MikroTik/RouterOSgeneric | 0 || 7.0.0 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
MikroTik RouterOS before 7.24 contains an out-of-bounds read vulnerability in the userspace SMB daemon that allows unauthenticated attackers to read beyond the end of the request buffer by supplying a crafted uniPwdLen field value in a minimal SMB1 SessionSetupAndX frame. The out-of-bounds read occurs in the SessionSetupAndX handler before any credential validation, potentially exposing sensitive memory contents.
Quoted source text, attributed separately from HOL analysis.