CVE-2018-1156
Mikrotik RouterOS before 6.42.7 and 6.40.9 is vulnerable to stack buffer overflow through the license upgrade interface.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Mikrotik RouterOS before 6.42.7 and 6.40.9 is vulnerable to stack buffer overflow through the license upgrade interface. This vulnerability could theoretically allow a remote authenticated attacker execute arbitrary code on the system.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 7.43% probability · 94th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- mikrotik/routeros
- Source
- vulnreport@tenable.com
EPSS moved from 6.2% on 21 September 2026 to 7.4% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- https://mikrotik.com/download/changelogsVendor Advisory
- https://mikrotik.com/download/changelogs/bugfix-release-treeVendor Advisory
- https://www.tenable.com/security/research/tra-2018-21Exploit, Third Party Advisory
- https://mikrotik.com/download/changelogsVendor Advisory
- https://mikrotik.com/download/changelogs/bugfix-release-treeVendor Advisory
- https://www.tenable.com/security/research/tra-2018-21Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.