WAGO: Managed Switches: Unauthorized creation of user accounts
Priority MEDIUM 45CWE-306Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-306.
Summary
In multiple managed switches by WAGO in different versions without authorization and with specially crafted packets it is possible to create users.
Why it matters now
EPSS 0.01111 66th 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-2021-20998
- 2026-10-03 Alias added: GHSA-wvfh-fc5m-v972
References
More WAGO 0852-0303 Firmware vulnerabilities
- 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-2021-04101 WAGO: Managed Switches: Storage of user credentials in a cookie 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-2021-20998 · CVE Program
- CVE-2021-20998 · NVD
- FIRST EPSS
- GHSA-wvfh-fc5m-v972 · GitHub Advisory Database · CC BY 4.0
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