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CVE-2018-1158

23
FAUCET Score

CVE-2018-1158 is a stack exhaustion vulnerability affecting Mikrotik RouterOS versions prior to 6.42.7 and 6.40.9. An authenticated remote attacker can exploit this flaw by sending specially crafted JSON data, leading to a denial of service by crashing the HTTP server. Rated as medium severity (CVSS 6.5), this vulnerability requires authentication and has a high impact on availability. There is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this CVE.

Impacted Technologies

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

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.48%
Probability of exploitation in next 30 days
EPSS Percentile
82.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0248 is in the 94th percentile among its peer group of 21,977 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 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

seclists.org / fulldisclosure/2019/Jul/20
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