Cisco Catalyst SD-WAN Manager up to 20.18.2_LI_Images API improper authentication
| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 9.6 | $0-$5k | 0.00 |
Summary
A vulnerability was found in Cisco Catalyst SD-WAN Manager. It has been rated as critical. This vulnerability affects unknown code of the component API. Performing a manipulation results in improper authentication. This vulnerability was named CVE-2026-20129. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.
Details
A vulnerability classified as very critical has been found in Cisco Catalyst SD-WAN Manager. This affects an unknown function of the component API. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:
A vulnerability in the API user authentication of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain access to an affected system as a user who has the netadmin role. The vulnerability is due to improper authentication for requests that are sent to the API. An attacker could exploit this vulnerability by sending a crafted request to the API of an affected system. A successful exploit could allow the attacker to execute commands with the privileges of the netadmin role. Note: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability.
It is possible to read the advisory at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2026-20129 since 10/08/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/06/2026).
The vulnerability scanner Nessus provides a plugin with the ID 300000 (Cisco Catalyst SD-WAN Manager < 20.18 Multiple Vulnerabilities (cisco-sa-sdwan-authbp-qwCX8D4v)), which helps to determine the existence of the flaw in a target environment.
Upgrading eliminates this vulnerability.
The vulnerability is also documented in the databases at Tenable (300000) and CERT Bund (WID-SEC-2026-0516). Be aware that VulDB is the high quality source for vulnerability data.
Affected
- Cisco Catalyst SD-WAN Manager
Product
Type
Vendor
Name
Version
- 17.2.4
- 17.2.5
- 17.2.6
- 17.2.7
- 17.2.8
- 17.2.9
- 17.2.10
- 18.2.0
- 18.3.0
- 18.3.1
- 18.3.1.1
- 18.3.3
- 18.3.3.1
- 18.3.4
- 18.3.5
- 18.3.6
- 18.3.6.1
- 18.3.7
- 18.3.8
- 18.4.0
- 18.4.0.1
- 18.4.1
- 18.4.3
- 18.4.4
- 18.4.5
- 18.4.6
- 18.4.302
- 18.4.303
- 18.4.501_ES
- 19.0.0
- 19.0.1a
- 19.1.0
- 19.2.0
- 19.2.097
- 19.2.098
- 19.2.099
- 19.2.1
- 19.2.2
- 19.2.3
- 19.2.4
- 19.2.4.0.1
- 19.2.4.0.8
- 19.2.4.0.9
- 19.2.31
- 19.2.32
- 19.2.929
- 19.3.0
- 20.1.1
- 20.1.1.1
- 20.1.2
- 20.1.2_937
- 20.1.3
- 20.1.3.1
- 20.1.12
- 20.3.1
- 20.3.2
- 20.3.2.0.5
- 20.3.2.0.6
- 20.3.2.1
- 20.3.2.1_927
- 20.3.2.1_930
- 20.3.2_925
- 20.3.2_928
- 20.3.2_929
- 20.3.2_937
- 20.3.3
- 20.3.3.0.2
- 20.3.3.0.4
- 20.3.3.0.8
- 20.3.3.0.14
- 20.3.3.0.16
- 20.3.3.0.17
- 20.3.3.0.18
- 20.3.3.1
- 20.3.3.1.1
- 20.3.3.1.2
- 20.3.3.1.5
- 20.3.3.1.7
- 20.3.3.1.10
- 20.3.3.2
- 20.3.4
- 20.3.4.0.1
- 20.3.4.0.5
- 20.3.4.0.6
- 20.3.4.0.9
- 20.3.4.0.11
- 20.3.4.0.19
- 20.3.4.0.20
- 20.3.4.0.24
- 20.3.4.0.25
- 20.3.4.0.26
- 20.3.4.1
- 20.3.4.1.1
- 20.3.4.1.2
- 20.3.4.2
- 20.3.4.2.1
- 20.3.4.2.2
- 20.3.4.3
- 20.3.5
- 20.3.5.0.7
- 20.3.5.0.8
- 20.3.5.0.9
- 20.3.5.1
- 20.3.6
- 20.3.7
- 20.3.7.1
- 20.3.7.2
- 20.3.8
- 20.3.813
- 20.3.814
- 20.4.1
- 20.4.1.0.01
- 20.4.1.0.02
- 20.4.1.0.1
- 20.4.1.1
- 20.4.1.1.5
- 20.4.1.2
- 20.4.2
- 20.4.2.0.1
- 20.4.2.0.2
- 20.4.2.0.4
- 20.4.2.1
- 20.4.2.1.1
- 20.4.2.2
- 20.4.2.2.1
- 20.4.2.2.2
- 20.4.2.2.3
- 20.4.2.2.4
- 20.4.2.2.8
- 20.4.2.3
- 20.5.0.1.1
- 20.5.1
- 20.5.1.0.1
- 20.5.1.0.2
- 20.5.1.1
- 20.5.1.2
- 20.6.0.18.3
- 20.6.0.18.4
- 20.6.1
- 20.6.1.0.1
- 20.6.1.1
- 20.6.1.2
- 20.6.2
- 20.6.2.0.4
- 20.6.2.1
- 20.6.2.2
- 20.6.2.2.2
- 20.6.2.2.3
- 20.6.2.2.4
- 20.6.2.2.7
- 20.6.3
- 20.6.3.0.2
- 20.6.3.0.5
- 20.6.3.0.7
- 20.6.3.0.10
- 20.6.3.0.11
- 20.6.3.0.14
- 20.6.3.0.18
- 20.6.3.0.19
- 20.6.3.0.23
- 20.6.3.0.25
- 20.6.3.0.27
- 20.6.3.0.29
- 20.6.3.0.31
- 20.6.3.0.32
- 20.6.3.0.33
- 20.6.3.0.38
- 20.6.3.0.39
- 20.6.3.0.40
- 20.6.3.0.41
- 20.6.3.0.45
- 20.6.3.0.46
- 20.6.3.0.47
- 20.6.3.0.51
- 20.6.3.1
- 20.6.3.1.1
- 20.6.3.2
- 20.6.3.3
- 20.6.3.4
- 20.6.4
- 20.6.4.0.4
- 20.6.4.0.19
- 20.6.4.0.21
- 20.6.4.1
- 20.6.4.2
- 20.6.5
- 20.6.5.1
- 20.6.5.1.2
- 20.6.5.1.3
- 20.6.5.1.4
- 20.6.5.1.5
- 20.6.5.1.6
- 20.6.5.1.7
- 20.6.5.1.9
- 20.6.5.1.10
- 20.6.5.1.11
- 20.6.5.1.13
- 20.6.5.1.14
- 20.6.5.2
- 20.6.5.2.1
- 20.6.5.2.3
- 20.6.5.2.4
- 20.6.5.2.8
- 20.6.5.3
- 20.6.5.4
- 20.6.5.5
- 20.6.6
- 20.6.6.0.1
- 20.6.7
- 20.6.8
- 20.7.1
- 20.7.1.0.2
- 20.7.1.1
- 20.7.1EFT2
- 20.7.2
- 20.8.1
- 20.9.1
- 20.9.1.1
- 20.9.1EFT2
- 20.9.1_LI_Images
- 20.9.2
- 20.9.2.0.01
- 20.9.2.1
- 20.9.2.2
- 20.9.2.3
- 20.9.2_LI_Images
- 20.9.3
- 20.9.3.0.2
- 20.9.3.0.3
- 20.9.3.0.4
- 20.9.3.0.5
- 20.9.3.0.7
- 20.9.3.0.8
- 20.9.3.0.12
- 20.9.3.0.16
- 20.9.3.0.17
- 20.9.3.0.18
- 20.9.3.0.20
- 20.9.3.0.21
- 20.9.3.0.23
- 20.9.3.0.24
- 20.9.3.0.25
- 20.9.3.0.26
- 20.9.3.0.29
- 20.9.3.1
- 20.9.3.2
- 20.9.3.2_LI_Images
- 20.9.3_LI_ Images
- 20.9.4
- 20.9.4.0.4
- 20.9.4.1
- 20.9.4.1.1
- 20.9.4.1.3
- 20.9.4.1.6
- 20.9.4.1_LI_Images
- 20.9.4_LI_Images
- 20.9.5
- 20.9.5.1
- 20.9.5.1.4
- 20.9.5.1_LI_Images
- 20.9.5.2
- 20.9.5.2.1
- 20.9.5.2.7
- 20.9.5.2.13
- 20.9.5.2.14
- 20.9.5.2.16
- 20.9.5.2.21
- 20.9.5.2_LI_Images
- 20.9.5.3
- 20.9.5.3_LI_Images
- 20.9.5_LI_Images
- 20.9.6
- 20.9.6.0.3
- 20.9.6_LI_Images
- 20.9.7
- 20.9.7.1
- 20.9.7.1_LI _Images
- 20.9.7_LI _Images
- 20.9.8
- 20.9.8_LI_Images
- 20.10.1
- 20.10.1.1
- 20.10.1.2
- 20.10.1_LI_Images
- 20.11.1
- 20.11.1.1
- 20.11.1.2
- 20.11.1_LI_Images
- 20.12.1
- 20.12.1_LI_Images
- 20.12.2
- 20.12.2_LI_Images
- 20.12.3
- 20.12.3.1
- 20.12.3_LI_Images
- 20.12.4
- 20.12.4.0.03
- 20.12.4.0.4
- 20.12.4.0.6
- 20.12.4.1
- 20.12.4.1_LI_Images
- 20.12.4_LI_Images
- 20.12.4_Monthly_ES5
- 20.12.5
- 20.12.5.1
- 20.12.5.1.01
- 20.12.5.1_LI_Images
- 20.12.5.2
- 20.12.5.2_LI_Images
- 20.12.5_LI_Images
- 20.12.6
- 20.12.6_LI_Images
- 20.12.401
- 20.12.501
- 20.13.1
- 20.13.1_LI_Images
- 20.14.1
- 20.14.1_LI_Images
- 20.15.1
- 20.15.1_LI_Images
- 20.15.2
- 20.15.2_LI_Images
- 20.15.3
- 20.15.3.1
- 20.15.4
- 20.15.4.1
- 20.15.4.1_LI_Images
- 20.15.4_LI_Images
- 20.16.1
- 20.16.1_LI_Images
- 20.18.1
- 20.18.1_LI_Images
- 20.18.2
- 20.18.2_LI_Images
License
Website
- Vendor: https://www.cisco.com/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 9.8VulDB Meta Temp Score: 9.6
VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔒
VulDB Reliability: 🔍
CNA Base Score: 9.8
CNA Vector (cisco): 🔒
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Improper authenticationCWE: CWE-287
CAPEC: 🔒
ATT&CK: 🔒
Physical: No
Local: No
Remote: Yes
Availability: 🔒
Status: Not defined
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Nessus ID: 300000
Nessus Name: Cisco Catalyst SD-WAN Manager < 20.18 Multiple Vulnerabilities (cisco-sa-sdwan-authbp-qwCX8D4v)
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔒
Timeline
10/08/2025 CVE reserved02/25/2026 Advisory disclosed
02/25/2026 VulDB entry created
03/06/2026 VulDB entry last update
Sources
Vendor: cisco.comAdvisory: cisco-sa-sdwan-authbp-qwCX8D4v
Status: Confirmed
CVE: CVE-2026-20129 (🔒)
GCVE (CVE): GCVE-0-2026-20129
GCVE (VulDB): GCVE-100-347823
CERT Bund: WID-SEC-2026-0516 - Cisco Catalyst SD-WAN Manager und SD-WAN Controller: Mehrere Schwachstellen
Entry
Created: 02/25/2026 18:34Updated: 03/06/2026 11:57
Changes: 02/25/2026 18:34 (65), 02/26/2026 12:37 (6), 02/28/2026 11:43 (2), 02/28/2026 21:38 (1), 03/06/2026 11:57 (1)
Complete: 🔍
Cache ID: 216::103
Be aware that VulDB is the high quality source for vulnerability data.
No comments yet. Languages: en.
Please log in to comment.