ICSA-26-272-06: MikroTik RouterOS
CISA advisory · released 2026-09-29
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 2, 2026-09-30 (final)
CISA's summary
Advisory Summary: Successful exploitation of this vulnerability could allow an attacker to achieve remote code execution or cause a denial of service.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| MikroTik | RouterOS | <7.24 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2026-84411 · CWE-191
The web management service in affected RouterOS versions contains an integer underflow in its HTTP request body handling that is reachable before authentication. This can be leveraged by an unauthenticated network attacker to achieve arbitrary code execution as root, or to cause a denial of service, using a single crafted request.
Acknowledgments, as the advisory lists them
- an anonymous researcher: reported this vulnerability to CISA
The advisory's legal notice
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Sources
DeSpy's copy of this version is dated 2026-09-30.
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