High Input validation

CVE-2026-76468 — Cisco Meraki Hardening Release - Input Validation Vulnerabilities

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco networking engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76468 are related to improper input validation that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-20.

Published Oct 7, 2026 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: cisco

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+2
Technical severity (high)+6
Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.23%

ahead of 13% of scored CVEs · Oct 14, 2026

Affects

Cisco

Cisco Campus Gateway Software and 3 more

CVSS base

8.2

High · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

Yes

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Cisco Cisco Campus Gateway Software, Cisco Cisco Meraki MR Wireless Access Points Software, Cisco Cisco Meraki MV Firmware…).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (input validation), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Cisco	Cisco Campus Gateway Software	version CG 33.1.3	Vulnerable	CVE Program (cve.org) e CISA ADP
Cisco	Cisco Meraki MR Wireless Access Points Software	version MR 33.1.2version MR 30.6version MR 32.1.7version MR 32.2.3version MR 32.2.4version MR 33.1.1	Vulnerable	CVE Program (cve.org) e CISA ADP
Cisco	Cisco Meraki MV Firmware	version 4.20version 5.0version 5.1version 5.2version 5.3version 5.4version 5.4.1version 5.5 and 81 more version 5.5.1version 5.6version 5.6.1version 6.0version 6.0.1version 5.6.2version 6.0.2version 6.1version 6.1.1version 6.1.2version 6.2version 6.2.1version 6.2.2version 6.3version 6.3.2version 2.0version 2.1version 2.2version 3.0version 3.1version 3.2version 3.3version 3.4version 3.5version 3.6version 3.7version 3.8version 3.9version 3.10version 3.11version 3.12version 3.13version 3.14version 3.15version 3.16version 3.17version 3.18version 3.19version 3.20version 3.21version 3.22version 3.23version 3.24version 3.25version 3.26version 3.27version 3.28version 3.29version 3.30version 3.31version 3.32version 3.33version 3.34version 3.35version 3.36version 4.0version 4.1version 4.2version 4.3version 4.4version 4.5version 4.6version 4.7version 4.8version 4.9version 4.10version 4.11version 4.12version 4.13version 4.14version 4.15version 4.16version 4.17version 4.18version 4.18.1version 4.19version MV 7.3version MV 7.3.1version MV 7.3.2version MV 7.2.1version MV 7.2.2	Vulnerable	CVE Program (cve.org) e CISA ADP
Cisco	Cisco Meraki MX Firmware	version 16.2version 16.3version 16.4version 16.5version 16.6version 17.3version 17.6version 17.7 and 13 more version 17.8version 17.9version 17.10version 18.1version 18.2version 19.1version MX 18.211.2version MX 26.2.1version MX 19.2.8version MX 26.2.2version MX 26.1.4version MX 26.1.5version MX 26.1.6	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

Low

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
8.2	CVSS 3.1	High	3.9	4.2	psirt@cisco.com via NIST National Vulnerability Database
8.2	CVSS 3.1	High	—	—	cisco via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L (score shown at the top: psirt@cisco.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-20 · Improper Input Validation

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.23%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
Affected products added · cisco/cisco campus gateway software, cisco/cisco meraki mr wireless access points software, cisco/cisco meraki mv firmwa
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
CVSS changed · 8.2
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Awaiting Analysis
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
Oct 7, 2026 · cisco

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

1 on the record

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-mera
NIST National Vulnerability Database

Elsewhere on this site

Cisco
every CVE for this vendor

Input validation
same class

CWE-20
other pages naming this weakness

Related CVEs (same products)

High CVE-2026-76472 Cisco Meraki Security Hardening Release October 2026 - Improper Neutralization of Special Elements Vulnerabilities 8d
High CVE-2026-76470 Cisco Meraki Hardening Release - Incorrect Calculation Vulnerabilities 8d
High CVE-2026-76469 Cisco Meraki Security Hardening Release: October 2026 Insufficient Control Flow Management Vulnerabilities 8d
Critical CVE-2026-76464 Cisco Meraki Hardening Release October 2026 - Buffer Management Vulnerabilities 8d
High CVE-2026-76467 Cisco Meraki Software Hardening Release - Resource Lifetime Management Vulnerabilities 8d
High CVE-2026-76463 Cisco Meraki Security Hardening Release: October 2026 - Improper Access Control Vulnerabilities 8d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-76468 is "Cisco Meraki Hardening Release - Input Validation Vulnerabilities", rated High. It affects Cisco Campus Gateway Software (Cisco); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.2 describes technical severity. EPSS 0.23% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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