Unauthenticated administrative access via crafted peering requests
Published Feb 25, 2026 · Updated Feb 25, 2026
Authentication bypass in Cisco Catalyst SD-WAN Manager allows remote attackers to obtain administrative access through crafted peering requests. The peering authentication mechanism incorrectly accepts crafted controller requests, admitting the attacker as an internal, high-privileged non-root account with NETCONF access. No credentials or special configuration are required; the resulting NETCONF session can alter SD-WAN fabric configuration, and internet-exposed control ports increase reachability.
Summary
What happened
Authentication bypass in Cisco Catalyst SD-WAN Manager allows remote attackers to obtain administrative access through crafted peering requests. The peering authentication mechanism incorrectly accepts crafted controller requests, admitting the attacker as an internal, high-privileged non-root account with NETCONF access. No credentials or special configuration are required; the resulting NETCONF session can alter SD-WAN fabric configuration, and internet-exposed control ports increase reachability.
The record
- CVE
- CVE-2026-20127
- Published
- Feb 25, 2026
- Updated
- Feb 25, 2026
- Vendor
- ClamAV
- Product
- Cisco Catalyst SD-WAN Manager
- Classifications
- CWE-287, T1199
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 25, 2026CVE publishedPublication date reported by the CVE source.
- Feb 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=17.2.10
- Affected versionversion=17.2.4
- Affected versionversion=17.2.5
- Affected versionversion=17.2.6
- Affected versionversion=17.2.7
- Affected versionversion=17.2.8
- Affected versionversion=17.2.9
- Affected versionversion=18.2.0
- Affected versionversion=18.3.0
- Affected versionversion=18.3.1
- Affected versionversion=18.3.1.1
- Affected versionversion=18.3.3
- Affected versionversion=18.3.3.1
- Affected versionversion=18.3.4
- Affected versionversion=18.3.5
- Affected versionversion=18.3.6
- Affected versionversion=18.3.6.1
- Affected versionversion=18.3.7
- Affected versionversion=18.3.8
- Affected versionversion=18.4.0
- Affected versionversion=18.4.0.1
- Affected versionversion=18.4.1
- Affected versionversion=18.4.3
- Affected versionversion=18.4.302
- Affected versionversion=18.4.303
- Affected versionversion=18.4.4
- Affected versionversion=18.4.5
- Affected versionversion=18.4.501_ES
- Affected versionversion=18.4.6
- Affected versionversion=19.0.0
- Affected versionversion=19.0.1a
- Affected versionversion=19.1.0
- Affected versionversion=19.2.0
- Affected versionversion=19.2.097
- Affected versionversion=19.2.098
- Affected versionversion=19.2.099
- Affected versionversion=19.2.1
- Affected versionversion=19.2.2
- Affected versionversion=19.2.3
- Affected versionversion=19.2.31
- Affected versionversion=19.2.32
- Affected versionversion=19.2.4
- Affected versionversion=19.2.4.0.1
- Affected versionversion=19.2.4.0.8
- Affected versionversion=19.2.4.0.9
- Affected versionversion=19.2.929
- Affected versionversion=19.3.0
- Affected versionversion=20.10.1
- Affected versionversion=20.10.1.1
- Affected versionversion=20.10.1.2
- Affected versionversion=20.10.1_LI_Images
- Affected versionversion=20.1.1
- Affected versionversion=20.1.1.1
- Affected versionversion=20.11.1
- Affected versionversion=20.11.1.1
- Affected versionversion=20.11.1.2
- Affected versionversion=20.11.1_LI_Images
- Affected versionversion=20.1.12
- Affected versionversion=20.1.2
- Affected versionversion=20.12.1
- Affected versionversion=20.12.1_LI_Images
- Affected versionversion=20.12.2
- Affected versionversion=20.12.2_LI_Images
- Affected versionversion=20.12.3
- Affected versionversion=20.12.3.1
- Affected versionversion=20.12.3_LI_Images
- Affected versionversion=20.12.4
- Affected versionversion=20.12.4.0.03
- Affected versionversion=20.12.401
- Affected versionversion=20.12.4.0.4
- Affected versionversion=20.12.4.0.6
- Affected versionversion=20.12.4.1
- Affected versionversion=20.12.4.1_LI_Images
- Affected versionversion=20.12.4_LI_Images
- Affected versionversion=20.12.4_Monthly_ES5
- Affected versionversion=20.12.5
- Affected versionversion=20.12.501
- Affected versionversion=20.12.5.1
- Affected versionversion=20.12.5.1.01
- Affected versionversion=20.12.5.1_LI_Images
- Affected versionversion=20.12.5.2
- Affected versionversion=20.12.5.2_LI_Images
- Affected versionversion=20.12.5_LI_Images
- Affected versionversion=20.12.6
- Affected versionversion=20.12.6_LI_Images
- Affected versionversion=20.1.2_937
- Affected versionversion=20.1.3
- Affected versionversion=20.1.3.1
- Affected versionversion=20.13.1
- Affected versionversion=20.13.1_LI_Images
- Affected versionversion=20.14.1
- Affected versionversion=20.14.1_LI_Images
- Affected versionversion=20.15.1
- Affected versionversion=20.15.1_LI_Images
- Affected versionversion=20.15.2
- Affected versionversion=20.15.2_LI_Images
- Affected versionversion=20.15.3
- Affected versionversion=20.15.3.1
- Affected versionversion=20.15.3_ LI _Images
- Affected versionversion=20.15.4
- Affected versionversion=20.15.4.1
- Affected versionversion=20.15.4.1_LI_Images
- Affected versionversion=20.15.4_LI_Images
- Affected versionversion=20.16.1
- Affected versionversion=20.16.1_LI_Images
- Affected versionversion=20.18.1
- Affected versionversion=20.18.1_LI_Images
- Affected versionversion=20.18.2
- Affected versionversion=20.18.2_LI_Images
- Affected versionversion=20.3.1
- Affected versionversion=20.3.2
- Affected versionversion=20.3.2.0.5
- Affected versionversion=20.3.2.0.6
- Affected versionversion=20.3.2.1
- Affected versionversion=20.3.2.1_927
- Affected versionversion=20.3.2.1_930
- Affected versionversion=20.3.2_925
- Affected versionversion=20.3.2_928
- Affected versionversion=20.3.2_929
- Affected versionversion=20.3.2_937
- Affected versionversion=20.3.3
- Affected versionversion=20.3.3.0.14
- Affected versionversion=20.3.3.0.16
- Affected versionversion=20.3.3.0.17
- Affected versionversion=20.3.3.0.18
- Affected versionversion=20.3.3.0.2
- Affected versionversion=20.3.3.0.4
- Affected versionversion=20.3.3.0.8
- Affected versionversion=20.3.3.1
- Affected versionversion=20.3.3.1.1
- Affected versionversion=20.3.3.1.10
- Affected versionversion=20.3.3.1.2
- Affected versionversion=20.3.3.1.5
- Affected versionversion=20.3.3.1.7
- Affected versionversion=20.3.3.2
- Affected versionversion=20.3.4
- Affected versionversion=20.3.4.0.1
- Affected versionversion=20.3.4.0.11
- Affected versionversion=20.3.4.0.19
- Affected versionversion=20.3.4.0.20
- Affected versionversion=20.3.4.0.24
- Affected versionversion=20.3.4.0.25
- Affected versionversion=20.3.4.0.26
- Affected versionversion=20.3.4.0.5
- Affected versionversion=20.3.4.0.6
- Affected versionversion=20.3.4.0.9
- Affected versionversion=20.3.4.1
- Affected versionversion=20.3.4.1.1
- Affected versionversion=20.3.4.1.2
- Affected versionversion=20.3.4.2
- Affected versionversion=20.3.4.2.1
- Affected versionversion=20.3.4.2.2
- Affected versionversion=20.3.4.3
- Affected versionversion=20.3.5
- Affected versionversion=20.3.5.0.7
- Affected versionversion=20.3.5.0.8
- Affected versionversion=20.3.5.0.9
- Affected versionversion=20.3.5.1
- Affected versionversion=20.3.6
- Affected versionversion=20.3.7
- Affected versionversion=20.3.7.1
- Affected versionversion=20.3.7.2
- Affected versionversion=20.3.8
- Affected versionversion=20.3.813
- Affected versionversion=20.3.814
- Affected versionversion=20.4.1
- Affected versionversion=20.4.1.0.01
- Affected versionversion=20.4.1.0.02
- Affected versionversion=20.4.1.0.1
- Affected versionversion=20.4.1.1
- Affected versionversion=20.4.1.1.5
- Affected versionversion=20.4.1.2
- Affected versionversion=20.4.2
- Affected versionversion=20.4.2.0.1
- Affected versionversion=20.4.2.0.2
- Affected versionversion=20.4.2.0.4
- Affected versionversion=20.4.2.1
- Affected versionversion=20.4.2.1.1
- Affected versionversion=20.4.2.2
- Affected versionversion=20.4.2.2.1
- Affected versionversion=20.4.2.2.2
- Affected versionversion=20.4.2.2.3
- Affected versionversion=20.4.2.2.4
- Affected versionversion=20.4.2.2.8
- Affected versionversion=20.4.2.3
- Affected versionversion=20.5.0.1.1
- Affected versionversion=20.5.1
- Affected versionversion=20.5.1.0.1
- Affected versionversion=20.5.1.0.2
- Affected versionversion=20.5.1.1
- Affected versionversion=20.5.1.2
- Affected versionversion=20.6.0.18.3
- Affected versionversion=20.6.0.18.4
- Affected versionversion=20.6.1
- Affected versionversion=20.6.1.0.1
- Affected versionversion=20.6.1.1
- Affected versionversion=20.6.1.2
- Affected versionversion=20.6.2
- Affected versionversion=20.6.2.0.4
- Affected versionversion=20.6.2.1
- Affected versionversion=20.6.2.2
- Affected versionversion=20.6.2.2.2
- Affected versionversion=20.6.2.2.3
- Affected versionversion=20.6.2.2.4
- Affected versionversion=20.6.2.2.7
- Affected versionversion=20.6.3
- Affected versionversion=20.6.3.0.10
- Affected versionversion=20.6.3.0.11
- Affected versionversion=20.6.3.0.14
- Affected versionversion=20.6.3.0.18
- Affected versionversion=20.6.3.0.19
- Affected versionversion=20.6.3.0.2
- Affected versionversion=20.6.3.0.23
- Affected versionversion=20.6.3.0.25
- Affected versionversion=20.6.3.0.27
- Affected versionversion=20.6.3.0.29
- Affected versionversion=20.6.3.0.31
- Affected versionversion=20.6.3.0.32
- Affected versionversion=20.6.3.0.33
- Affected versionversion=20.6.3.0.38
- Affected versionversion=20.6.3.0.39
- Affected versionversion=20.6.3.0.40
- Affected versionversion=20.6.3.0.41
- Affected versionversion=20.6.3.0.45
- Affected versionversion=20.6.3.0.46
- Affected versionversion=20.6.3.0.47
- Affected versionversion=20.6.3.0.5
- Affected versionversion=20.6.3.0.51
- Affected versionversion=20.6.3.0.7
- Affected versionversion=20.6.3.1
- Affected versionversion=20.6.3.1.1
- Affected versionversion=20.6.3.2
- Affected versionversion=20.6.3.3
- Affected versionversion=20.6.3.4
- Affected versionversion=20.6.4
- Affected versionversion=20.6.4.0.19
- Affected versionversion=20.6.4.0.21
- Affected versionversion=20.6.4.0.4
- Affected versionversion=20.6.4.1
- Affected versionversion=20.6.4.2
- Affected versionversion=20.6.5
- Affected versionversion=20.6.5.1
- Affected versionversion=20.6.5.1.10
- Affected versionversion=20.6.5.1.11
- Affected versionversion=20.6.5.1.13
- Affected versionversion=20.6.5.1.14
- Affected versionversion=20.6.5.1.2
- Affected versionversion=20.6.5.1.3
- Affected versionversion=20.6.5.1.4
- Affected versionversion=20.6.5.1.5
- Affected versionversion=20.6.5.1.6
- Affected versionversion=20.6.5.1.7
- Affected versionversion=20.6.5.1.9
- Affected versionversion=20.6.5.2
- Affected versionversion=20.6.5.2.1
- Affected versionversion=20.6.5.2.3
- Affected versionversion=20.6.5.2.4
- Affected versionversion=20.6.5.2.8
- Affected versionversion=20.6.5.3
- Affected versionversion=20.6.5.4
- Affected versionversion=20.6.5.5
- Affected versionversion=20.6.6
- Affected versionversion=20.6.6.0.1
- Affected versionversion=20.6.7
- Affected versionversion=20.6.8
- Affected versionversion=20.7.1
- Affected versionversion=20.7.1.0.2
- Affected versionversion=20.7.1.1
- Affected versionversion=20.7.1EFT2
- Affected versionversion=20.7.2
- Affected versionversion=20.8.1
- Affected versionversion=20.9.1
- Affected versionversion=20.9.1.1
- Affected versionversion=20.9.1EFT2
- Affected versionversion=20.9.1_LI_Images
- Affected versionversion=20.9.2
- Affected versionversion=20.9.2.0.01
- Affected versionversion=20.9.2.1
- Affected versionversion=20.9.2.2
- Affected versionversion=20.9.2.3
- Affected versionversion=20.9.2_LI_Images
- Affected versionversion=20.9.3
- Affected versionversion=20.9.3.0.12
- Affected versionversion=20.9.3.0.16
- Affected versionversion=20.9.3.0.17
- Affected versionversion=20.9.3.0.18
- Affected versionversion=20.9.3.0.2
- Affected versionversion=20.9.3.0.20
- Affected versionversion=20.9.3.0.21
- Affected versionversion=20.9.3.0.23
- Affected versionversion=20.9.3.0.24
- Affected versionversion=20.9.3.0.25
- Affected versionversion=20.9.3.0.26
- Affected versionversion=20.9.3.0.29
- Affected versionversion=20.9.3.0.3
- Affected versionversion=20.9.3.0.4
- Affected versionversion=20.9.3.0.5
- Affected versionversion=20.9.3.0.7
- Affected versionversion=20.9.3.0.8
- Affected versionversion=20.9.3.1
- Affected versionversion=20.9.3.2
- Affected versionversion=20.9.3.2_LI_Images
- Affected versionversion=20.9.3_LI_ Images
- Affected versionversion=20.9.4
- Affected versionversion=20.9.4.0.4
- Affected versionversion=20.9.4.1
- Affected versionversion=20.9.4.1.1
- Affected versionversion=20.9.4.1.3
- Affected versionversion=20.9.4.1.6
- Affected versionversion=20.9.4.1_LI_Images
- Affected versionversion=20.9.4_LI_Images
- Affected versionversion=20.9.5
- Affected versionversion=20.9.5.1
- Affected versionversion=20.9.5.1.4
- Affected versionversion=20.9.5.1_LI_Images
- Affected versionversion=20.9.5.2
- Affected versionversion=20.9.5.2.1
- Affected versionversion=20.9.5.2.13
- Affected versionversion=20.9.5.2.14
- Affected versionversion=20.9.5.2.16
- Affected versionversion=20.9.5.2.21
- Affected versionversion=20.9.5.2.7
- Affected versionversion=20.9.5.2_LI_Images
- Affected versionversion=20.9.5.3
- Affected versionversion=20.9.5.3_LI_Images
- Affected versionversion=20.9.5_LI_Images
- Affected versionversion=20.9.6
- Affected versionversion=20.9.6.0.3
- Affected versionversion=20.9.6_LI_Images
- Affected versionversion=20.9.7
- Affected versionversion=20.9.7.1
- Affected versionversion=20.9.7.1_LI _Images
- Affected versionversion=20.9.7_LI _Images
- Affected versionversion=20.9.8
- Affected versionversion=20.9.8_LI_Images
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.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- UAT-8616threat actor
- Limited exploitation reported by Cisco PSIRTreported exploitation
Technologies
Your stack
See the directory against your own environment.
Your stack
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