CVE-2017-7902

9.8 CRITICAL 3% exploit odds Fix listed Crypto Device

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 2.6% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2017-06-30 03:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 01:25 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 2.6% in the next 30 days (EPSS).
Severity: 9.8 CRITICAL (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2017-06-30 03:29 UTC
Last modified: 2026-06-17 01:25 UTC
Exploit probability: 2.6% · EPSS, next 30 days
Weakness: CWE-323
Record status: Modified

Affected

Rockwellautomation 1763-l16awa Series A ≤ 16.000
Rockwellautomation 1763-l16awa Series B ≤ 16.000
Rockwellautomation 1763-l16bbb Series A ≤ 16.000
Rockwellautomation 1763-l16bbb Series B ≤ 16.000
Rockwellautomation 1763-l16bwa Series A ≤ 16.000
Rockwellautomation 1763-l16bwa Series B ≤ 16.000
Rockwellautomation 1763-l16dwd Series A ≤ 16.000
Rockwellautomation 1763-l16dwd Series B ≤ 16.000

Attack profile CVSS 3.0 · 9.8

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record