Cisco Catalyst SD-WAN Manager up to 26.0.1 Web UI logging of excessive data
| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 5.7 | $0-$5k | 0.00 |
Summary
A vulnerability marked as critical has been reported in Cisco Catalyst SD-WAN Manager. This vulnerability affects unknown code of the component Web UI. Performing a manipulation results in logging of excessive data. This vulnerability is reported as CVE-2026-20210. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.
Details
A vulnerability, which was classified as critical, was found in Cisco Catalyst SD-WAN Manager. This affects an unknown code of the component Web UI. The manipulation with an unknown input leads to a logging of excessive data vulnerability. CWE is classifying the issue as CWE-779. The product logs too much information, making log files hard to process and possibly hindering recovery efforts or forensic analysis after an attack. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:
A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker with read-only permissions to modify configurations and perform unauthorized actions on an affected system. This vulnerability exists because of a failure to redact sensitive information within device configurations and templates. An attacker could exploit this vulnerability by elevating their read-only permissions to those of a high-privileged user. A successful exploit could allow the attacker to access or modify configuration settings within Cisco Catalyst SD-WAN Manager as a high-privileged user.
It is possible to read the advisory at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2026-20210 since 10/08/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. 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 05/20/2026).
The vulnerability scanner Nessus provides a plugin with the ID 315344 (Cisco Catalyst SD-WAN Manager Vulnerabilities (cisco-sa-sdwan-mltvnps2-JxpWm7R)), 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 (315344) and CERT Bund (WID-SEC-2026-1540). 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
- 20.9.8.2
- 20.9.8.2_LI_Images
- 20.9.8_LI_Images
- 20.9.9
- 20.9.9_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
- 20.12.5.3
- 20.12.5.3_LI_Images
- 20.12.5_LI_Images
- 20.12.6
- 20.12.6.1
- 20.12.6.1_LI_Images
- 20.12.6_LI_Images
- 20.12.7
- 20.12.7_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
- 20.15.4.2
- 20.15.4.2_LI_Images
- 20.15.4_LI_Images
- 20.15.5
- 20.15.5_LI_Images
- 20.16.1
- 20.16.1_LI_Images
- 20.18.1
- 20.18.1_LI_Images
- 20.18.2
- 20.18.2.1
- 20.18.2.1_LI_Images
- 20.18.2.2
- 20.18.2.2_LI_Images
- 20.18.2_LI_Images
- 20.18.3
- 20.18.3_LI_Images
- 26.0.1
License
Website
- Vendor: https://www.cisco.com/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 5.9VulDB Meta Temp Score: 5.7
VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍
CNA Base Score: 5.4
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: Logging of excessive dataCWE: CWE-779 / CWE-404
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: 315344
Nessus Name: Cisco Catalyst SD-WAN Manager Vulnerabilities (cisco-sa-sdwan-mltvnps2-JxpWm7R)
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔒
Timeline
10/08/2025 CVE reserved05/14/2026 Advisory disclosed
05/14/2026 VulDB entry created
05/20/2026 VulDB entry last update
Sources
Vendor: cisco.comAdvisory: cisco-sa-sdwan-mltvnps2-JxpWm7R
Status: Confirmed
CVE: CVE-2026-20210 (🔒)
GCVE (CVE): GCVE-0-2026-20210
GCVE (VulDB): GCVE-100-363927
CERT Bund: WID-SEC-2026-1540 - Cisco Catalyst SD-WAN Manager: Mehrere Schwachstellen
Entry
Created: 05/14/2026 19:59Updated: 05/20/2026 03:55
Changes: 05/14/2026 19:59 (64), 05/17/2026 10:23 (7), 05/20/2026 03:55 (2)
Complete: 🔍
Cache ID: 216::103
Be aware that VulDB is the high quality source for vulnerability data.
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