WAGO: Managed Switches: Storage of user credentials in a cookie
Priority LOW 34CWE-312Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-312.
Summary
In multiple managed switches by WAGO in different versions the webserver cookies of the web based UI contain user credentials.
Why it matters now
EPSS 0.00542 45th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| WAGO | 0852-0303 | up to V1.2.3.S0 | — | No fix listed | CNA |
| WAGO | 0852-1305 | up to V1.1.7.S0 | — | No fix listed | CNA |
| WAGO | 0852-1505 | up to V1.1.6.S0 | — | No fix listed | CNA |
| WAGO | 0852-1305/000-001 | up to V1.0.4.S0 | — | No fix listed | CNA |
| WAGO | 0852-1505/000-001 | up to V1.0.4.S0 | — | No fix listed | CNA |
- 0852-0303 VendorWAGO Affected up to V1.2.3.S0 Fixed in — No fix listed CNA
- 0852-1305 VendorWAGO Affected up to V1.1.7.S0 Fixed in — No fix listed CNA
- 0852-1505 VendorWAGO Affected up to V1.1.6.S0 Fixed in — No fix listed CNA
- 0852-1305/000-001 VendorWAGO Affected up to V1.0.4.S0 Fixed in — No fix listed CNA
- 0852-1505/000-001 VendorWAGO Affected up to V1.0.4.S0 Fixed in — No fix listed CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:wago:0852-0303_firmware:*:*:*:*:*:*:*:* | up to 1.2.3.s0 | Vulnerable | WAGO |
| cpe:2.3:h:wago:0852-0303:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WAGO |
| cpe:2.3:o:wago:0852-1305_firmware:*:*:*:*:*:*:*:* | up to 1.1.7.s0 | Vulnerable | WAGO |
| cpe:2.3:h:wago:0852-1305:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WAGO |
| cpe:2.3:o:wago:0852-1505_firmware:*:*:*:*:*:*:*:* | up to 1.1.6.s0 | Vulnerable | WAGO |
| cpe:2.3:h:wago:0852-1505:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WAGO |
| cpe:2.3:o:wago:0852-1305\/000-001_firmware:*:*:*:*:*:*:*:* | up to 1.0.4.s0 | Vulnerable | WAGO |
| cpe:2.3:h:wago:0852-1305\/000-001:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WAGO |
| cpe:2.3:o:wago:0852-1505\/000-001_firmware:*:*:*:*:*:*:*:* | up to 1.0.4.s0 | Vulnerable | WAGO |
| cpe:2.3:h:wago:0852-1505\/000-001:-:*:*:*:*:*:*:* | not specified by NVD | Running on | WAGO |
- cpe:2.3:o:wago:0852-0303_firmware:*:*:*:*:*:*:*:* Versions up to 1.2.3.s0 Vulnerable ·WAGO
- cpe:2.3:h:wago:0852-0303:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
- cpe:2.3:o:wago:0852-1305_firmware:*:*:*:*:*:*:*:* Versions up to 1.1.7.s0 Vulnerable ·WAGO
- cpe:2.3:h:wago:0852-1305:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
- cpe:2.3:o:wago:0852-1505_firmware:*:*:*:*:*:*:*:* Versions up to 1.1.6.s0 Vulnerable ·WAGO
- cpe:2.3:h:wago:0852-1505:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
- cpe:2.3:o:wago:0852-1305\/000-001_firmware:*:*:*:*:*:*:*:* Versions up to 1.0.4.s0 Vulnerable ·WAGO
- cpe:2.3:h:wago:0852-1305\/000-001:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
- cpe:2.3:o:wago:0852-1505\/000-001_firmware:*:*:*:*:*:*:*:* Versions up to 1.0.4.s0 Vulnerable ·WAGO
- cpe:2.3:h:wago:0852-1505\/000-001:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·WAGO
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20995
- 2026-10-03 Alias added: GHSA-h3wh-323m-4h77
References
More WAGO 0852-0303 Firmware vulnerabilities
- TI-2021-04104 WAGO: Managed Switches: Unauthorized creation of user accounts CVSS 3.1CRITICAL 10.0
- TI-2021-04100 WAGO: Managed Switches: Reflected Cross-site Scripting CVSS 3.1HIGH 8.8
- TI-2021-04103 WAGO: Managed Switches: Unauthorized access to password hashes CVSS 3.1HIGH 7.5
- TI-2021-04102 WAGO: Managed Switches: Unsecure Cookie settings CVSS 3.1MEDIUM 5.3
- TI-2021-04099 WAGO: Managed Switches: Exposure of sensitive information through directory listing CVSS 3.1MEDIUM 5.3
Sources
- CVE-2021-20995 · CVE Program
- CVE-2021-20995 · NVD
- FIRST EPSS
- GHSA-h3wh-323m-4h77 · GitHub Advisory Database · CC BY 4.0
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