CVE-2024-20263

MEDIUMNVD 5.85.8—
EchelonGraph scoreMEDIUM confidence

Score 5.8 from GitHub Security Advisory published 2024-01-26. NVD baseline CVSS 5.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.8Exploit: None knownExposed: 0

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

A vulnerability with the access control list (ACL) management within a stacked switch configuration of Cisco Business 250 Series Smart Switches and Business 350 Series Managed Switches could allow an unauthenticated, remote attacker to bypass protection offered by a configured ACL on an affected device. This vulnerability is due to incorrect processing of ACLs on a stacked configuration when either the primary or backup switches experience a full stack reload or power cycle. An attacker could exploit this vulnerability by sending crafted traffic through an affected device. A successful exploit could allow the attacker to bypass configured ACLs, causing traffic to be dropped or forwarded in an unexpected manner. The attacker does not have control over the conditions that result in the device being in the vulnerable state. Note: In the vulnerable state, the ACL would be correctly applied on the primary devices but could be incorrectly applied to the backup devices.

CVSS v3
5.8
EG Score
5.8(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity58% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

January 26, 2024

Last Modified

November 21, 2024

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 41× 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 109 total refreshes for this CVE.

  1. 2026-07-28 15:34 UTCEPSS rescore
  2. 2026-07-27 14:11 UTCEPSS rescore
  3. 2026-07-26 14:53 UTCEPSS rescore
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  7. 2026-07-23 14:17 UTCEPSS rescore
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  9. 2026-07-23 02:33 UTCEG score recompute
  10. 2026-07-22 23:19 UTCEG score recompute
  11. 2026-07-22 14:07 UTCEPSS rescore
  12. 2026-07-21 15:23 UTCEPSS rescore
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  1. 2026-07-12 05:45 UTCEPSS rescore
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  17. 2026-06-28 14:06 UTCEPSS rescore
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  20. 2026-06-27 03:07 UTCEPSS rescore
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  22. 2026-06-25 13:48 UTCEPSS rescore
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  25. 2026-06-23 21:32 UTCEPSS rescore
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  27. 2026-06-22 14:24 UTCEPSS rescore
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  35. 2026-06-18 17:51 UTCEPSS rescore
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  40. 2026-06-15 17:47 UTCEPSS rescore
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  42. 2026-06-13 22:59 UTCEPSS rescore
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  44. 2026-06-12 23:11 UTCEPSS rescore
  45. 2026-06-12 23:11 UTCEPSS rescore
  46. 2026-06-11 13:59 UTCEPSS rescore
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  48. 2026-06-10 22:17 UTCEPSS rescore
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  50. 2026-06-10 13:21 UTCEPSS rescore
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  52. 2026-06-08 14:16 UTCEPSS rescore
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  54. 2026-06-07 15:24 UTCEPSS rescore
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  56. 2026-06-06 13:46 UTCEPSS rescore
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  60. 2026-06-05 06:09 UTCEPSS rescore
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  67. 2026-06-01 13:51 UTCEPSS rescore
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  71. 2026-05-31 00:15 UTCEPSS rescore
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  73. 2026-05-29 13:43 UTCEPSS rescore
  74. 2026-05-28 13:44 UTCEPSS rescore
  75. 2026-05-28 13:44 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2024-20263?
CVE-2024-20263 is a medium vulnerability published on January 26, 2024. A vulnerability with the access control list (ACL) management within a stacked switch configuration of Cisco Business 250 Series Smart Switches and Business 350 Series Managed Switches could allow an unauthenticated, remote attacker to bypass protection offered by a configured ACL on an affected…
When was CVE-2024-20263 disclosed?
CVE-2024-20263 was first published in the National Vulnerability Database on January 26, 2024, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-20263 actively exploited?
CVE-2024-20263 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.2% of all scored CVEs.
What is the CVSS score of CVE-2024-20263?
CVE-2024-20263 has a CVSS v3 base score of 5.8 (NVD).
How do I remediate CVE-2024-20263?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-20263, 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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