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Cisco’s October 2026 security-hardening advisory covers Meraki Campus Gateways, MG Cellular Gateways, MR wireless access points, MS switches, MV smart cameras, and MX security and SD-WAN appliances. The fix depends on the product family and software release train; Cisco says there is no workaround for the vulnerabilities in this advisory. Check the matching first fixed release below against the device’s Dashboard update options, and contact Meraki Technical Support if the expected update is unavailable.
What the October 2026 Meraki advisory covers
Cisco published its “Cisco Meraki Security Hardening Release: October 2026” advisory on October 7 and updated it on October 8, 2026. It describes multiple internally discovered vulnerabilities and software hardening releases across six Meraki product families. The listed vulnerability classes include improper access control, memory buffer bounds, resource lifetime, input validation, control-flow management, incorrect calculation, and improper neutralization of special elements.
Cisco says the affected product families are in scope regardless of device configuration. Cisco reported that the flaws were found during internal testing and were not known to be actively exploited when the advisory was published. The advisory reports a maximum CVSS base score of 9.6 for the single most impactful underlying vulnerability in a CWE grouping; that is not a score for every flaw or every device. Cisco says no workarounds address these vulnerabilities and recommends upgrading to the fixed software listed in the advisory.
First fixed releases by product family
The table reproduces the first fixed releases Cisco lists in its October 2026 advisory. These are release-train-specific; do not substitute a version from another product family or advisory. The dates Cisco gives for certain releases were still in the future on October 13, 2026, so verify availability in Dashboard rather than assuming a listed release can already be installed.
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| Product family | Release train | First fixed release listed by Cisco |
|---|---|---|
| Campus Gateway | 32.2 | 32.2.5 (scheduled for late October 2026) |
| Campus Gateway | 33.1 | 33.1.4 (scheduled for mid-November 2026) |
| MG Cellular Gateway | 26.1 | 26.1.4 |
| MR Wireless Access Point | 30.7 | 30.7.3 |
| MR Wireless Access Point | 31.1 | 31.1.8.1 |
| MR Wireless Access Point | 32.2 | 32.2.5 (scheduled for late October 2026) |
| MR Wireless Access Point | 33.1 | 33.1.3 |
| MS Series Switch | 18.1 | 18.1.9 (scheduled for mid-October 2026) |
| MS Series Switch | IOS XE 17.15 | 17.15.6 |
| MS Series Switch | IOS XE 17.18 | 17.18.4.1 |
| MS Series Switch | IOS XE 26.1 | 26.1.2 |
| MV Smart Camera | 7 | 8.0 |
| MX Security and SD-WAN Appliance | 18.1 | 18.107.14 |
| MX Security and SD-WAN Appliance | 19.2 | 19.2.9 (available only for Meraki Z3 devices) |
| MX Security and SD-WAN Appliance | 26.1 | 26.1.7 |
| MX Security and SD-WAN Appliance | 26.2 | 26.2.3 |
Cisco notes that if MX releases 18.107.14 or 19.2.9 do not appear as update options, customers should contact Meraki Technical Support. Release availability and supported upgrade paths can depend on the device and its current software; use the Dashboard options for the specific appliance and confirm with Cisco Support if the path is unclear.
How to identify the right update
- Identify the device and software train. Confirm the exact product family, model, and current software release in your Meraki Dashboard. A device’s brand alone does not establish whether a particular advisory applies.
- Match the advisory to the issue. Check the affected software and any configuration conditions in the relevant Cisco security advisory. For the October 2026 hardening release, use the matching product-family and train row above.
- Check the update options in Dashboard. Confirm that the listed fixed release is offered for the device. Some October 2026 releases have scheduled availability dates that fall after the advisory’s October 8 update.
- Upgrade using the supported path. Follow Cisco’s advisory, the available Dashboard options, and your normal change-management process. If the expected version is missing or the upgrade path is unclear, contact Meraki Technical Support rather than selecting a different train’s version.
- Recheck the advisory and availability. Cisco may revise fixed-release details, and the Dashboard is the practical check for what is currently available to the device.
Earlier AnyConnect VPN flaws affect a narrower set of devices
Do not confuse the October 2026 hardening release with Cisco’s separate AnyConnect VPN advisories, published October 2, 2024 and updated June 2, 2025. Those advisories concern selected MX and Z Series Teleworker Gateway devices running vulnerable firmware with AnyConnect enabled; they are not the affected-device list for the 2026 release.
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2024 AnyConnect denial-of-service vulnerability bundle
The affected-device list in Cisco’s bundle includes MX64/64W, MX65/65W, MX67 variants, MX68 variants, MX75, MX84, MX85, MX95, MX100, MX105, MX250, MX400, MX450, MX600, vMX, and Z3/Z3C/Z4/Z4C. Exposure requires vulnerable MX firmware and AnyConnect enabled. Devices configured exclusively for Client VPN using L2TP/IPsec are not affected by the TLS/DTLS-processing vulnerabilities in this bundle.
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The bundle describes unauthenticated denial-of-service scenarios: malformed SSL VPN session parameters can cause the AnyConnect server to restart and drop connections; other flaws can prevent new SSL VPN connections or terminate targeted sessions. Cisco’s advisory gives the bundle a CVSS base score of 8.6 and says software updates address the vulnerabilities; no workarounds address them.
2024 AnyConnect session takeover and denial-of-service flaw
A separate Cisco advisory covers CVE-2024-20509, which Cisco describes as a possible AnyConnect session takeover or denial of service on affected MX and Z devices. As with the bundle, the device must be running vulnerable firmware and have AnyConnect enabled. Cisco lists 18.107.13 as the first fixed release for train 18.1 and 18.211.3 for train 18.2. Devices on release families 16.2 and 17 must migrate to a fixed release; versions earlier than 16.2 are listed as not affected. MX64 and MX65 AnyConnect support applies only on firmware 17.6 and later. These are historical advisory details, so check the individual advisory for model-specific limitations and current release guidance before acting on them.
For this specific CVE, Cisco says disabling AnyConnect removes the attack vector, but recommends upgrading to fixed software. In combined view, the Dashboard path is Security Appliance > Configure > Client VPN > AnyConnect Settings. For Z devices, use Teleworker gateway > Configure > Client VPN > AnyConnect Settings.
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Other Meraki-related security advisories
Windows Systems Manager Agent
Cisco’s September 4, 2024 advisory for CVE-2024-20430 concerns the Meraki Systems Manager Agent for Windows, not Meraki hardware firmware. Cisco says the Mac agent is not affected. The fix was released through Dashboard on June 12, 2024, and Cisco recommends agent release 4.2.0 or later. Deployments with Agent Version Control set to “latest” or to 4.2.0 or later upgrade automatically.
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Cisco’s March 25, 2026 advisory for CVE-2026-20115 covers confidential device information exposed through an insecure tunnel during configuration upload. It affects Catalyst 9200, Catalyst 9300, Catalyst CW9800H1 wireless controllers, and Meraki MS390 when running vulnerable IOS XE with Dashboard management enabled. Cisco says software updates address the flaw and provides no workaround. This is not a claim that all Meraki MS switches are affected by CVE-2026-20115.
The October 2026 Meraki hardening advisory separately points to an August 2026 IOS XE hardening advisory for cloud-configured Catalyst devices managed through Dashboard. Treat that as a distinct advisory and check its own affected-product and fixed-software sections; do not transfer its scope or version numbers to other Meraki hardware.
What the advisory does—and does not—say about impact
The October 2026 advisory describes vulnerabilities and fixed releases, not a count of compromised devices or a population-wide incident estimate. Its exploitation statement is limited to Cisco’s report that the vulnerabilities were not known to be actively exploited when the advisory was published. A CVSS score measures advisory severity, not the number of affected or compromised devices.
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