CVE-2017-7899

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

An Information Exposure 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. User credentials are sent to the web server using the HTTP GET method, which may result in the credentials being logged. This could make user credentials available for unauthorized retrieval.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
91%
KEV
Not listed

Published

June 30, 2017

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Sep 21, 2026
No patch confirmed yet.
generic

Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400 | CISA

https://ics-cert.us-cert.gov/advisories/ICSA-17-115-04
generic
http://www.securitytracker.com/id/1038546

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 21× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 169 total refreshes for this CVE.

  1. 2026-09-24 13:59 UTCEPSS rescore
  2. 2026-09-23 13:42 UTCEPSS rescore
  3. 2026-09-21 20:27 UTCEPSS rescore
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  1. 2026-08-18 13:43 UTCEPSS rescore
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  20. 2026-07-23 14:15 UTCEPSS rescore
  21. 2026-07-23 01:30 UTCEG score recompute
  22. 2026-07-22 22:10 UTCEG score recompute
  23. 2026-07-22 14:04 UTCEPSS rescore
  24. 2026-07-21 15:21 UTCEPSS rescore
  25. 2026-07-20 17:04 UTCEPSS rescore
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  27. 2026-07-19 14:28 UTCEPSS rescore
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  40. 2026-07-12 05:43 UTCEPSS rescore
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  42. 2026-07-09 19:06 UTCEPSS rescore
  43. 2026-07-08 15:11 UTCEPSS rescore
  44. 2026-07-07 13:42 UTCEPSS rescore
  45. 2026-07-06 16:24 UTCEPSS rescore
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  47. 2026-07-06 02:20 UTCEPSS rescore
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  49. 2026-07-05 02:27 UTCEPSS rescore
  50. 2026-07-04 06:28 UTCEPSS rescore
  51. 2026-07-04 06:28 UTCEPSS rescore
  52. 2026-07-02 16:54 UTCEPSS rescore
  53. 2026-07-01 15:03 UTCEPSS rescore
  54. 2026-06-30 23:19 UTCEPSS rescore
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  56. 2026-06-28 04:53 UTCEPSS rescore
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  59. 2026-06-25 13:47 UTCEPSS rescore
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  68. 2026-06-21 01:57 UTCEPSS rescore
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  70. 2026-06-19 19:23 UTCEPSS rescore
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  72. 2026-06-18 17:50 UTCEPSS rescore
  73. 2026-06-17 17:50 UTCEPSS rescore
  74. 2026-06-16 17:50 UTCEPSS rescore
  75. 2026-06-15 17:45 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2017-7899?
CVE-2017-7899 is a critical vulnerability published on June 30, 2017. An Information Exposure 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…
When was CVE-2017-7899 disclosed?
CVE-2017-7899 was first published in the National Vulnerability Database on June 30, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-7899 actively exploited?
CVE-2017-7899 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.7% of all scored CVEs.
What is the CVSS score of CVE-2017-7899?
CVE-2017-7899 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-7899?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-7899, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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