CVE-2024-43099

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2024-09-13. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

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

The session hijacking attack targets the application layer's control mechanism, which manages authenticated sessions between a host PC and a PLC. During such sessions, a session key is utilized to maintain security. However, if an attacker captures this session key, they can inject traffic into an ongoing authenticated session. To successfully achieve this, the attacker also needs to spoof both the IP address and MAC address of the originating host which is typical of a session-based attack.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
—
EPSS
20.5%
KEV
Not listed

Published

September 13, 2024

Last Modified

April 15, 2026

Advisory Details (1)

Auto-updated May 22, 2026
Patch available. Sources: cisa.
cisa Patch Available

AutomationDirect DirectLogic H2-DM1E | CISA

https://www.cisa.gov/news-events/ics-advisories/icsa-24-256-17

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 43× 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 114 total refreshes for this CVE.

  1. 2026-07-22 14:07 UTCEPSS rescore
  2. 2026-07-21 15:23 UTCEPSS rescore
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  1. 2026-07-06 02:22 UTCEPSS rescore
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  39. 2026-06-10 22:18 UTCEPSS rescore
  40. 2026-06-10 13:21 UTCEPSS rescore
  41. 2026-06-08 14:16 UTCEPSS rescore
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  43. 2026-06-07 15:24 UTCEPSS rescore
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  45. 2026-06-06 13:46 UTCEPSS rescore
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  47. 2026-06-05 22:46 UTCEPSS rescore
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  51. 2026-06-04 13:11 UTCEPSS rescore
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  74. 2026-05-22 21:16 UTCEPSS rescore
  75. 2026-05-21 23:31 UTCEG score recompute

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Frequently asked(5)

What is CVE-2024-43099?
CVE-2024-43099 is a high vulnerability published on September 13, 2024. The session hijacking attack targets the application layer's control mechanism, which manages authenticated sessions between a host PC and a PLC. During such sessions, a session key is utilized to maintain security. However, if an attacker captures this session key, they can inject traffic into an…
When was CVE-2024-43099 disclosed?
CVE-2024-43099 was first published in the National Vulnerability Database on September 13, 2024, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-43099 actively exploited?
CVE-2024-43099 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-43099?
CVE-2024-43099 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2024-43099?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-43099, 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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