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Full vulnerability report · 2018
CVE-2018-0161High confidence

Cisco IOS Software Resource Management Errors Vulnerability

Cisco · IOS Software

6.3MediumCVSS 3.1
Recommended action
Mitigate now

CISA confirms exploitation in the wild and lists 2022-03-17 as the remediation due date.

Mitigation available
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2018-0984

CISA KEV mirrored by ENISA

A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software running on certain models of Cisco Catalyst Switches could allow an authenticated, remote attacker to cause a denial of service (DoS) condition, aka a GET MIB Object ID Denial of Service Vulnerability. The vulnerability is due to a condition that could occur when the affected software processes an SNMP read request that contains a request for the ciscoFlashMIB object ID (OID). An attacker could trigger this vulnerability by issuing an SNMP GET request for the ciscoFlashMIB OID on an affected device. A successful exploit could cause the affected device to restart due to a SYS-3-CPUHOG. This vulnerability affects the following Cisco devices if they are running a vulnerable release of Cisco IOS Software and are configured to use SNMP Version 2 (SNMPv2) or SNMP Version 3 (SNMPv3): Cisco Catalyst 2960-L Series Switches, Cisco Catalyst Digital Building Series Switches 8P, Cisco Catalyst Digital Building Series Switches 8U. Cisco Bug IDs: CSCvd89541.

EUVD state
Present in the current official mapping
Known exploitation
Recorded by ENISA since 3 Mar 2022. Evidence sources: cisa_kev.
ENISA score
6.3 · CVSS 3.1
Advisory evidence
2 linked advisory records
Recommended actionMitigate now

CISA confirms exploitation in the wild and lists 2022-03-17 as the remediation due date.

Mitigation available
01

What, why and how

A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software running on certain models of Cisco Catalyst Switches could allow an authenticated, remote attacker to cause a denial-of-service (DoS) condition.

What

A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software running on certain models of Cisco Catalyst Switches could allow an authenticated, remote attacker to cause a denial-of-service (DoS) condition.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software running on certain models of Cisco Catalyst Switches could allow an authenticated, remote attacker to cause a denial-of-service (DoS) condition.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Confirmed in the wild

CISA added this CVE to its Known Exploited Vulnerabilities catalogue on 2022-03-03.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → vulnerable operation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Changed: exploitation can affect a different security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-399 ↗

CWE-399. Open the MITRE definition for the exact weakness description.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SChangedScope: The attack can affect a component governed by a different security authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkCWE-399CISA KEV
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2018-0984Known-exploited evidence recorded

A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software running on certain models of Cisco Catalyst Switches could allow an authenticated, remote attacker to cause a denial of service (DoS) condition, aka a GET MIB Object ID Denial of Service Vulnerability. The vulnerability is due to a condition that could occur when the affected software processes an SNMP read request that contains a request for the ciscoFlashMIB object ID (OID). An attacker could trigger this vulnerability by issuing an SNMP GET request for the ciscoFlashMIB OID on an affected device. A successful exploit could cause the affected device to restart due to a SYS-3-CPUHOG. This vulnerability affects the following Cisco devices if they are running a vulnerable release of Cisco IOS Software and are configured to use SNMP Version 2 (SNMPv2) or SNMP Version 3 (SNMPv3): Cisco Catalyst 2960-L Series Switches, Cisco Catalyst Digital Building Series Switches 8P, Cisco Catalyst Digital Building Series Switches 8U. Cisco Bug IDs: CSCvd89541.

Official EUVD record ↗
BSI · German · WID-SEC-2025-1871Cisco IOS: Mehrere Schwachstellen

Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Cisco IOS und Cisco IOS XE ausnutzen, um Daten zu manipulieren, vertrauliche Daten einzusehen, einen Denial of Service Angriff durchzuführen, seine Privilegien zu erweitern, Cross-Site Scripting Angriffe durchzuführen, Sicherheitsmechanismen zu umgehen oder beliebigen Code mit administrativen Privilegien zur Ausführung zu bringen.

Official advisory ↗
Canadian Centre for Cyber Security · English · AV18-052Cisco security updates

I Authorization Bypass Vulnerability -Cisco IOS XE Software for Cisco 4000 Series Integrated Services Routers Privileged EXEC Mode Root Shell Access Vulnerability -Cisco IOS XE Software Privileged EXEC Mode Root Shell Access Vulnerability -Cisco IOS Software 802.1x Multiple-Authentication Port Authentication Bypass Vulnerability -Cisco IOS XE Software CLI Command Injection Vulnerabilities -Cisco IOS and IOS XE Software Forwarding Information Base Denial of Service Vulnerability CVE References:  CVE-2018-0150, CVE-2018-0151, CVE-2018-0152, CVE-2018-0154, CVE-2018-0155, CVE-2018-0156, CVE-2018-0157, CVE-2018-0158, CVE-2018-0159, CVE-2018-0160, CVE-2018-0161, CVE-2018-0163, CVE-2018-0164, CVE-2018-0165, CVE-2018-0167, CVE-2018-0169, CVE-2018-0170, CVE-2018-0171, CVE-2018-0172, CVE-2018-0173, CVE-2018-0174, CVE-2018-0175, CVE-2018-0176, CVE-2018-0177, CVE-2018-0179, CVE-2018-0180, CVE-2018-0182, CVE-2018-0183, CVE-2018-0184, CVE-2018-0185, CVE-2018-0186, CVE-2018-0188, CVE-2018-0189, CVE-2018-0190, CVE-2018-0193, CVE-2018-0195, CVE-2018-0196 Suggested Action CCIRC recommends that system administrators test and deploy the vendor-released updates to affected applications accordingly. References: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-xesc https://too

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-156Multiples vulnérabilités dans les produits Cisco

.cve.org/CVERecord?id=CVE-2018-0151 Référence CVE CVE-2018-0152 https://www.cve.org/CVERecord?id=CVE-2018-0152 Référence CVE CVE-2018-0154 https://www.cve.org/CVERecord?id=CVE-2018-0154 Référence CVE CVE-2018-0155 https://www.cve.org/CVERecord?id=CVE-2018-0155 Référence CVE CVE-2018-0156 https://www.cve.org/CVERecord?id=CVE-2018-0156 Référence CVE CVE-2018-0157 https://www.cve.org/CVERecord?id=CVE-2018-0157 Référence CVE CVE-2018-0158 https://www.cve.org/CVERecord?id=CVE-2018-0158 Référence CVE CVE-2018-0159 https://www.cve.org/CVERecord?id=CVE-2018-0159 Référence CVE CVE-2018-0160 https://www.cve.org/CVERecord?id=CVE-2018-0160 Référence CVE CVE-2018-0161 https://www.cve.org/CVERecord?id=CVE-2018-0161 Référence CVE CVE-2018-0165 https://www.cve.org/CVERecord?id=CVE-2018-0165 Référence CVE CVE-2018-0167 https://www.cve.org/CVERecord?id=CVE-2018-0167 Référence CVE CVE-2018-0169 https://www.cve.org/CVERecord?id=CVE-2018-0169 Référence CVE CVE-2018-0170 https://www.cve.org/CVERecord?id=CVE-2018-0170 Référence CVE CVE-2018-0171 https://www.cve.org/CVERecord?id=CVE-2018-0171 Référence CVE CVE-2018-0172 https://www.cve.org/CVERecord?id=CVE-2018-0172 Référence CVE CVE-2018-0173 https://www.cve.org/CVERecord?id=CVE-2018-0173 Référence CVE CVE-2018-0174 https://www.cve.org/CVERecord?id=CVE-2018-0174 Ré

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2018-003519Cisco IOS ソフトウェアにおけるリソース管理に関する脆弱性

Cisco IOS ソフトウェアには、リソース管理に関する脆弱性が存在します。 ベンダは、本脆弱性を Cisco Bug ID：CSCvd89541 として公開しています。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-4847Cisco IOS 소프트웨어 신규 취약점 보안 업데이트 권고

취약점(CVE-2018-0161) [6]

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Mitigation available
Affected
Cisco IOS: Cisco IOS
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
Apply the mitigation in the linked authoritative guidance while planning the vendor's permanent fix.
Workaround
A mitigation or workaround reference is available from the source linked below; validate it against the affected product and version.
04

Evidence and provenance

Published 28 Mar 2018 · Last source change 12 Jan 2026, 21:56 UTC · CWE-399

CVE recordCVE.org · 5.2
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-09-01
European sourceENISA EUVD · EUVD-2018-0984
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    Cisco IOS · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    Cisco IOS: Cisco IOS · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    CNA ↗
  2. Vendor guidanceAuthoritative vendor guidance changed from no authoritative guidance recorded to authoritative remediation link · mitigation.
    Before
    no authoritative guidance recorded
    After
    authoritative remediation link · mitigation
    af854a3a-2127-422b-91ae-364da2661108 ↗
  3. Remediation statusRemediation status changed from Awaiting fix to Mitigation available.
    Before
    Awaiting fix
    After
    Mitigation available
    af854a3a-2127-422b-91ae-364da2661108 ↗
  4. CVSS scoreCVSS scoring authority changed from CISA ADP to NIST NVD; the displayed base score remained 6.3.
    Before
    6.3 (CVSS 3.1 · CISA ADP · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H)
    After
    6.3 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H)
    NIST NVD ↗
  5. ENISA known-exploited stateENISA EUVD now records this CVE in its known-exploited dataset.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2018-0984","listed":true,"sources":["cisa_kev"]}
    ENISA EUVD ↗
  6. ENISA EUVD mappingEUVD-2018-0984 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2018-0984"}
    ENISA EUVD ↗
  7. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Added to CISA KEV
Mitigation reference recorded
ENISA EUVD · EUVD-2018-0984↗CISA KEV record↗Mitigation reference↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2018-0161 · cve.blacktree.nl