Configuration disclosure via insecure Meraki tunnel
Published Mar 25, 2026 · Updated Mar 25, 2026
Cleartext transmission in Cisco IOS XE Software allows man-in-the-middle attackers to read sensitive device configurations. The Meraki secure channel uploads a device configuration through an insecure tunnel, exposing its contents to an on-path interceptor. Exposure requires Meraki Dashboard management on a listed Catalyst 9200 or 9300 switch, CW9800H1 controller, or MS390 and an attacker positioned between the device and Dashboard.
Summary
What happened
Cleartext transmission in Cisco IOS XE Software allows man-in-the-middle attackers to read sensitive device configurations. The Meraki secure channel uploads a device configuration through an insecure tunnel, exposing its contents to an on-path interceptor. Exposure requires Meraki Dashboard management on a listed Catalyst 9200 or 9300 switch, CW9800H1 controller, or MS390 and an attacker positioned between the device and Dashboard.
The record
- CVE
- CVE-2026-20115
- Published
- Mar 25, 2026
- Updated
- Mar 25, 2026
- Vendor
- ClamAV
- Product
- Cisco IOS XE Software
- Classifications
- CWE-319, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 25, 2026CVE publishedPublication date reported by the CVE source.
- Mar 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=17.14.1
- Affected versionversion=17.14.1a
- Affected versionversion=17.15.1
- Affected versionversion=17.15.1a
- Affected versionversion=17.15.1b
- Affected versionversion=17.15.1w
- Affected versionversion=17.15.1x
- Affected versionversion=17.15.1y
- Affected versionversion=17.15.1z
- Affected versionversion=17.15.2
- Affected versionversion=17.15.2a
- Affected versionversion=17.15.2b
- Affected versionversion=17.15.2c
- Affected versionversion=17.15.3
- Affected versionversion=17.15.3a
- Affected versionversion=17.15.3b
- Affected versionversion=17.15.4
- Affected versionversion=17.15.4d
- Affected versionversion=17.15.4e
- Affected versionversion=17.16.1
- Affected versionversion=17.16.1a
- Affected versionversion=17.17.1
- Affected versionversion=17.18.1
- Affected versionversion=17.18.1a
- Affected versionversion=17.18.1w
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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