CVE-2018-7445

Exp

A buffer overflow was found in the MikroTik RouterOS SMB service when processing NetBIOS session request messages. Remote attackers with access to the service can exploit this vulnerability and gain code execution on the system. The overflow occurs before authentication takes place, so it is possible for an unauthenticated remote attacker to exploit it. All architectures and all devices running RouterOS before versions 6.41.3/6.42rc27 are vulnerable.

Published: 2018-03-19 Last update: 2025-11-07 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-7445 is rated Critical Active Threat (100/100): CVSS Critical severity, with high exploitation likelihood (EPSS 87.56%, 99th percentile). CISA KEV confirms active exploitation (added 2022-09-08) affecting MikroTik / RouterOS. a weakness (CWE-119) Unauthenticated remote administrative access may be possible. EPSS rose +1.66% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2018-7445

Name: MikroTik RouterOS Stack-Based Buffer Overflow Vulnerability · CISA KEV detail

Exploit added: 2022-09-08

Action due: 2022-09-29

Required action: Apply updates per vendor instructions.

Public exploit references (Exploit-DB) for CVE-2018-7445

EDB-ID Source Kind Published Link
44290 exploit_db edb 2018-03-15 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-7445

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-19 85.90% 87.56% +1.66%
2 2026-02-21 84.56% 85.90% +1.34%
3 2026-01-28 — 84.56% —

Full EPSS history (45 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-7445

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2018-7445

Affected software / configurations for CVE-2018-7445

Vendor Product Version Raw CPE
mikrotik routeros < 6.41.3 cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*
mikrotik routeros 6.42 cpe:2.3:o:mikrotik:routeros:6.42:rc11:*:*:*:*:*:*
mikrotik routeros 6.42 cpe:2.3:o:mikrotik:routeros:6.42:rc12:*:*:*:*:*:*
mikrotik routeros 6.42 cpe:2.3:o:mikrotik:routeros:6.42:rc14:*:*:*:*:*:*
mikrotik routeros 6.42 cpe:2.3:o:mikrotik:routeros:6.42:rc15:*:*:*:*:*:*
mikrotik routeros 6.42 cpe:2.3:o:mikrotik:routeros:6.42:rc18:*:*:*:*:*:*
mikrotik routeros 6.42 cpe:2.3:o:mikrotik:routeros:6.42:rc2:*:*:*:*:*:*
mikrotik routeros 6.42 cpe:2.3:o:mikrotik:routeros:6.42:rc20:*:*:*:*:*:*
mikrotik routeros 6.42 cpe:2.3:o:mikrotik:routeros:6.42:rc23:*:*:*:*:*:*
mikrotik routeros 6.42 cpe:2.3:o:mikrotik:routeros:6.42:rc24:*:*:*:*:*:*
mikrotik routeros 6.42 cpe:2.3:o:mikrotik:routeros:6.42:rc5:*:*:*:*:*:*
mikrotik routeros 6.42 cpe:2.3:o:mikrotik:routeros:6.42:rc6:*:*:*:*:*:*
mikrotik routeros 6.42 cpe:2.3:o:mikrotik:routeros:6.42:rc9:*:*:*:*:*:*

References for CVE-2018-7445

cvelogic Threat Intelligence