CVE-2024-20317

HIGHNVD 7.47.4
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 7.4 from GitHub Security Advisory (severity: HIGH) published 2024-09-11. NVD baseline CVSS 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week

Also known asEUVD-2024-18032 (ENISA EUVD) · GHSA-qcxf-jg3p-ww69 (GitHub Security Advisories)Source: ENISA EUVD

7.4EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.4Exploit: None knownExposed services: Not assessed

The vendor states that a fix is released ("Cisco has released software updates that address this vulnerability"), but the CVE record does not name the fixed version — check the vendor's advisory for the fixed release and apply it.

A vulnerability in the handling of specific Ethernet frames by Cisco IOS XR Software for various Cisco Network Convergence System (NCS) platforms could allow an unauthenticated, adjacent attacker to cause critical priority packets to be dropped, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect classification of certain types of Ethernet frames that are received on an interface. An attacker could exploit this vulnerability by sending specific types of Ethernet frames to or through the affected device. A successful exploit could allow the attacker to cause control plane protocol relationships to fail, resulting in a DoS condition. For more information, see the section of this advisory. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

CVSS v3
7.4
EG Score
7.4HIGHmedium confidence
EG Risk
33
EG Risk 33/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity74% × 45%
Impact severity (EG Severity): CVSS 7.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: The vendor states that a fix is released ("Cisco has released software updates that address this vulnerability"), but the CVE record does not name the fixed version. Check the vendor's advisory for the fixed release and apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
14th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.4): severity, escalated by confirmed exploitation. This CVE's 7.4 is its impact severity (EG Severity), not escalated.

EG Severity
7.4 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

The vendor states that a fix is released ("Cisco has released software updates that address this vulnerability"), but the CVE record does not name the fixed version. Check the vendor's advisory for the fixed release and apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 11, 2024

Last Modified

October 3, 2024

References (1)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 39× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 97 of 202 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 3 repeat rows among the latest 100 are merged into the row they repeat. The 105 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-10-30 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  4. 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-10-28 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  6. 2026-10-28 15:40 UTCEG score recompute
  7. 2026-10-28 15:40 UTCGHSA enrichmentGHSA-qcxf-jg3p-ww69 · GitHub severity HIGH · GitHub CVSS 7.4
  8. 2026-10-27 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  9. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-10-25 17:19 UTCEG score recompute
  11. 2026-10-25 16:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
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  15. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  16. 2026-10-20 20:42 UTCEG score recompute
  17. 2026-10-20 20:42 UTCGHSA enrichmentGHSA-qcxf-jg3p-ww69 · GitHub severity HIGH · GitHub CVSS 7.4
  18. 2026-10-20 16:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  19. 2026-10-19 16:29 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  20. 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-10-18 07:29 UTCEG score recompute
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  1. 2026-10-13 16:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-10-12 18:04 UTCEG score recompute
  3. 2026-10-12 16:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-10-11 21:29 UTCEG score recompute
  5. 2026-10-11 16:22 UTCEG score recompute
  6. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  7. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.2% · 13th percentile
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  10. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
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  15. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  16. 2026-09-30 16:50 UTCEG score recompute
  17. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  18. 2026-09-29 15:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  19. 2026-09-28 13:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
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Frequently asked(5)

What is CVE-2024-20317?
CVE-2024-20317 is a high-severity vulnerability; its CVE record was published on September 11, 2024. A vulnerability in the handling of specific Ethernet frames by Cisco IOS XR Software for various Cisco Network Convergence System (NCS) platforms could allow an unauthenticated, adjacent attacker to cause critical priority packets to be dropped, resulting in a denial of service (DoS) condition.…
When was the CVE record for CVE-2024-20317 published?
The CVE record for CVE-2024-20317 was published on September 11, 2024. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 3, 2024; the record at its source may have been updated since.
Is CVE-2024-20317 actively exploited?
CVE-2024-20317 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-20317?
CVE-2024-20317 has a CVSS v3 base score of 7.4 (NVD).
How do I remediate CVE-2024-20317?
The CVE record for CVE-2024-20317 states that the vendor has released a fix: "Cisco has released software updates that address this vulnerability." The record does not name the fixed version: check the vendor's advisory for the fixed release and update to it.

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