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CVE-2018-1156

31
FAUCET Score

CVE-2018-1156 describes a stack buffer overflow vulnerability in Mikrotik RouterOS versions prior to 6.42.7 and 6.40.9, affecting the license upgrade interface. This high-severity flaw (CVSS 8.8) allows a remote authenticated attacker to execute arbitrary code on the system with low attack complexity and no user interaction required. While the vulnerability has a high potential impact on confidentiality, integrity, and availability, there is currently no evidence of active exploitation, public exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.40.9CPE matchmatch criteria
cpe:2.3:o:mikrotik:routeros:*:*:*:*:ltr:*:*:*
< 6.42.7CPE matchmatch criteria
cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
7.37%
Probability of exploitation in next 30 days
EPSS Percentile
93.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0737 is in the 93rd percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (4)

bindvendor investigatingvia llm_extracted
dogukanurkervendor investigatingvia llm_extracted
kerasvendor investigatingvia llm_extracted
posthogvendor investigatingvia llm_extracted

Vendor Advisories (4)

dogukanurkerllm-dogukanurker-d816fca9ae5a08bcCRITICAL

[R1] Mikrotik RouterOS Multiple Authenticated Vulnerabilities

Aug 22, 2018
kerasllm-keras-1d6e98d9795c2040CRITICAL

[R1] Mikrotik RouterOS Multiple Authenticated Vulnerabilities

Aug 22, 2018
bindllm-bind-6b4356f0062c727fCRITICAL

Mikrotik RouterOS Multiple Authenticated Vulnerabilities

Aug 22, 2018
posthogllm-posthog-9080fe20dbec84afCRITICAL

[R1] Mikrotik RouterOS Multiple Authenticated Vulnerabilities

Aug 22, 2018

References

mikrotik.com / download/changelogs
Vendor Advisory
mikrotik.com / download/changelogs/bugfix-release-tree
Vendor Advisory
tenable.com / security/research/tra-2018-21
ExploitThird Party Advisory