CVE-2018-0179

Exp

Multiple vulnerabilities in the Login Enhancements (Login Block) feature of Cisco IOS Software could allow an unauthenticated, remote attacker to trigger a reload of an affected system, resulting in a denial of service (DoS) condition. These vulnerabilities affect Cisco devices that are running Cisco IOS Software Release 15.4(2)T, 15.4(3)M, or 15.4(2)CG and later. Cisco Bug IDs: CSCuy32360, CSCuz60599.

Published: 2018-03-28 Last update: 2026-01-14 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-0179 is rated Active Exploitation (78.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.03%). CISA KEV confirms active exploitation (added 2022-03-03) affecting Cisco / IOS Software. a weakness (CWE-399) Unauthenticated remote administrative access may be possible. 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-2018-0179

Name: Cisco IOS Software Denial-of-Service Vulnerability · CISA KEV detail

Exploit added: 2022-03-03

Action due: 2022-03-17

Required action: Apply updates per vendor instructions.

Exploit prediction scoring system (EPSS) score for CVE-2018-0179

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 2026-03-07 1.50% 2.03% +0.52%
2 2026-01-13 2.02% 1.50% -0.52%
3 2025-12-16 — 2.02% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-0179

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 3.6 [email protected]
6.8 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 4.0 134c704f-9b21-4f2e-91b3-4a467353bcc0
7.1 2.0 HIGH
AV:N/AC:M/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 6.9 [email protected]

Weakness enumeration for CVE-2018-0179

Affected software / configurations for CVE-2018-0179

Vendor Product Version Raw CPE
cisco ios 15.3\(00.00.19\)sy cpe:2.3:o:cisco:ios:15.3\(00.00.19\)sy:*:*:*:*:*:*:*
cisco ios 15.4\(01\)ia001.100 cpe:2.3:o:cisco:ios:15.4\(01\)ia001.100:*:*:*:*:*:*:*
cisco ios 15.6\(01.22\)t cpe:2.3:o:cisco:ios:15.6\(01.22\)t:*:*:*:*:*:*:*
cisco ios 15.4\(03\)m4.1 cpe:2.3:o:cisco:ios:15.4\(03\)m4.1:*:*:*:*:*:*:*
cisco ios 15.4\(2\)cg cpe:2.3:o:cisco:ios:15.4\(2\)cg:*:*:*:*:*:*:*
cisco ios 15.4\(2\)t cpe:2.3:o:cisco:ios:15.4\(2\)t:*:*:*:*:*:*:*
cisco ios 15.4\(3\)m cpe:2.3:o:cisco:ios:15.4\(3\)m:*:*:*:*:*:*:*

References for CVE-2018-0179

cvelogic Threat Intelligence