A "Reusing a Nonce, Key Pair in Encryption" issue was discovered in Rockwell Automation…
Priority MEDIUM 47CWE-323Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
A "Reusing a Nonce, Key Pair in Encryption" issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers 1763-L16AWA, Series A and B, Version 16.00 and prior versions; 1763-L16BBB, Series A and B, Version 16.00 and prior versions; 1763-L16BWA, Series A and B, Version 16.00 and prior versions; and 1763-L16DWD, Series A and B, Version 16.00 and prior versions and Allen-Bradley MicroLogix 1400 programmable logic controllers 1766-L32AWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWAA, Series A and B, Version 16.00 and prior versions; 1766-L32BXB, Series A and B, Version 16.00 and prior versions; 1766-L32BXBA, Series A and B, Version 16.00 and prior versions; and 1766-L32AWAA, Series A and B, Version 16.00 and prior versions. The affected product reuses nonces, which may allow an attacker to capture and replay a valid request until the nonce is changed.
Why it matters now
EPSS 0.02559 85th 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 |
|---|---|---|---|---|---|
| — | Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400 | Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400 | — | No fix listed | CNA |
- Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400 Vendor— Affected Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400 Fixed in — No fix listed CNA
CPE configurations NVD · 22
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:rockwellautomation:1763-l16awa_series_a:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1763-l16awa_series_b:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1763-l16bbb_series_a:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1763-l16bbb_series_b:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1763-l16bwa_series_a:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1763-l16bwa_series_b:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1763-l16dwd_series_a:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1763-l16dwd_series_b:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:ab_micrologix_controller:1100:*:*:*:*:*:*:* | 1100 | Running on | Rockwell |
| cpe:2.3:a:rockwellautomation:1766-l32awa_series_a:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
- cpe:2.3:a:rockwellautomation:1763-l16awa_series_a:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1763-l16awa_series_b:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1763-l16bbb_series_a:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1763-l16bbb_series_b:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1763-l16bwa_series_a:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1763-l16bwa_series_b:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1763-l16dwd_series_a:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1763-l16dwd_series_b:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:ab_micrologix_controller:1100:*:*:*:*:*:*:* Versions 1100 Running on ·Rockwell
- cpe:2.3:a:rockwellautomation:1766-l32awa_series_a:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
Show 12 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:rockwellautomation:1766-l32awa_series_b:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1766-l32awaa_series_a:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1766-l32awaa_series_b:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1766-l32bwa_series_a:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1766-l32bwa_series_b:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1766-l32bwaa_series_a:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1766-l32bwaa_series_b:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1766-l32bxb_series_a:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1766-l32bxb_series_b:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1766-l32bxba_series_a:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:a:rockwellautomation:1766-l32bxba_series_b:*:*:*:*:*:*:*:* | up to 16.000 | Vulnerable | Rockwell |
| cpe:2.3:h:rockwellautomation:ab_micrologix_controller:1400:*:*:*:*:*:*:* | 1400 | Running on | Rockwell |
- cpe:2.3:a:rockwellautomation:1766-l32awa_series_b:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1766-l32awaa_series_a:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1766-l32awaa_series_b:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1766-l32bwa_series_a:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1766-l32bwa_series_b:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1766-l32bwaa_series_a:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1766-l32bwaa_series_b:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1766-l32bxb_series_a:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1766-l32bxb_series_b:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1766-l32bxba_series_a:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:a:rockwellautomation:1766-l32bxba_series_b:*:*:*:*:*:*:*:* Versions up to 16.000 Vulnerable ·Rockwell
- cpe:2.3:h:rockwellautomation:ab_micrologix_controller:1400:*:*:*:*:*:*:* Versions 1400 Running on ·Rockwell
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2017-7902
- 2026-10-03 Alias added: GHSA-r727-5v4m-6fx7
References
More Rockwell 1763-l16awa Series A vulnerabilities
- TI-2017-05509 Missing brute-force protection in Rockwell Automation Allen-Bradley MicroLogix 1100 and… CVSS 3.1CRITICAL 9.8
- TI-2017-05513 A Weak Password Requirements issue was discovered in Rockwell Automation Allen-Bradley… CVSS 3.1CRITICAL 9.8
- TI-2016-00782 Stack-based buffer overflow on Rockwell Automation Allen-Bradley MicroLogix 1100 devices… CVSS 3.0CRITICAL 9.8
- TI-2017-05510 Information disclosure in Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400 CVSS 3.0CRITICAL 9.8
- TI-2017-05511 A Predictable Value Range from Previous Values issue was discovered in Rockwell… CVSS 3.0HIGH 8.6
- TI-2016-07614 An issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 controller… CVSS 3.0HIGH 7.3
Sources
- CVE-2017-7902 · CVE Program
- CVE-2017-7902 · NVD
- FIRST EPSS
- GHSA-r727-5v4m-6fx7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences