Cisco Catalyst SD-WAN Manager up to 20.18.2_LI_Images REST API incorrect privileged apis

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.3	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as very critical has been discovered in Cisco Catalyst SD-WAN Manager. This issue affects some unknown processing of the component REST API. Executing a manipulation can lead to incorrect use of privileged apis. The identification of this vulnerability is CVE-2026-20126. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical was found in Cisco Catalyst SD-WAN Manager. This vulnerability affects an unknown functionality of the component REST API. The manipulation with an unknown input leads to a incorrect use of privileged apis vulnerability. The CWE definition for the vulnerability is CWE-648. The product does not conform to the API requirements for a function call that requires extra privileges. This could allow attackers to gain privileges by causing the function to be called incorrectly. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in Cisco Catalyst SD-WAN Manager could allow an authenticated, local attacker with low privileges to gain root privileges on the underlying operating system. This vulnerability is due to an insufficient user authentication mechanism in the REST API. An attacker could exploit this vulnerability by sending a request to the REST API of the affected system. A successful exploit could allow the attacker to gain root privileges on the underlying operating system.

The advisory is shared for download at sec.cloudapps.cisco.com. This vulnerability was named CVE-2026-20126 since 10/08/2025. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/06/2026).

The vulnerability scanner Nessus provides a plugin with the ID 299999 (Cisco Catalyst SD-WAN Manager 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 (299999) and CERT Bund (WID-SEC-2026-0516). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• Cisco Catalyst SD-WAN Manager

Productinfo

Type

• Network Management Software

Vendor

• Cisco

Name

• Catalyst SD-WAN Manager

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

• commercial

Website

• Vendor: https://www.cisco.com/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.3

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

CNA Base Score: 8.8
CNA Vector (cisco): 🔒

CVSSv2info

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: 🔍

Exploitinginfo

Class: Incorrect use of privileged apis
CWE: CWE-648
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
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: 299999
Nessus Name: Cisco Catalyst SD-WAN Manager Multiple Vulnerabilities (cisco-sa-sdwan-authbp-qwCX8D4v)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/08/2025 CVE reserved
02/25/2026 +140 days Advisory disclosed
02/25/2026 +0 days VulDB entry created
03/06/2026 +9 days VulDB entry last update

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-sdwan-authbp-qwCX8D4v
Status: Confirmed

CVE: CVE-2026-20126 (🔒)
GCVE (CVE): GCVE-0-2026-20126
GCVE (VulDB): GCVE-100-347824
CERT Bund: WID-SEC-2026-0516 - Cisco Catalyst SD-WAN Manager und SD-WAN Controller: Mehrere Schwachstellen

Entryinfo

Created: 02/25/2026 18:34
Updated: 03/06/2026 11:57
Changes: 02/25/2026 18:34 (64), 02/26/2026 12:37 (6), 02/28/2026 11:43 (2), 02/28/2026 21:38 (1), 03/04/2026 22:53 (11), 03/06/2026 11:57 (1)
Complete: 🔍
Cache ID: 216::103

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