CVE-2018-1156

HIGHNVD 8.88.8—

8.8

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 v3: 8.8
EG Score: 8.8(medium)
EPSS: 86.3%
KEV: Not listed

Published

August 23, 2018

Last Modified

November 21, 2024

References (6)

vulnreport@tenablehttps://mikrotik.com/download/changelogs
vulnreport@tenablehttps://mikrotik.com/download/changelogs/bugfix-release-tree
vulnreport@tenablehttps://www.tenable.com/security/research/tra-2018-21
af854a3a-2127-422b-91ae-364da2661108https://mikrotik.com/download/changelogs
af854a3a-2127-422b-91ae-364da2661108https://mikrotik.com/download/changelogs/bugfix-release-tree
af854a3a-2127-422b-91ae-364da2661108https://www.tenable.com/security/research/tra-2018-21

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-787Out-of-bounds Write

Data Freshness Timeline

(refreshed 9× in last 7d / 17× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 03:50 UTCEG score recompute
2026-05-28 03:50 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-1156?

CVE-2018-1156 is a high vulnerability published on August 23, 2018. 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.

When was CVE-2018-1156 disclosed?

CVE-2018-1156 was first published in the National Vulnerability Database on August 23, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-1156 actively exploited?

CVE-2018-1156 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 86.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-1156?

CVE-2018-1156 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2018-1156?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-1156, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2018-1156

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-1156?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)