CVE-2024-9448Network attack vector

Traffic Policy bypass via untagged packet handling

Published May 8, 2025 · Updated Aug 25, 2025

Improper access control in Arista EOS allows remote attackers to bypass Traffic Policy drop rules with untagged packets on affected switches. On 7050X4 and 7358X4 switches, ingress processing does not apply configured Traffic Policy rules to received untagged packets and forwards traffic that a matching rule should drop. Exposure requires a configured Traffic Policy; the bypass can deliver packets to destinations that the policy was intended to block.

CVSS severity7.5
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Arista EOS allows remote attackers to bypass Traffic Policy drop rules with untagged packets on affected switches. On 7050X4 and 7358X4 switches, ingress processing does not apply configured Traffic Policy rules to received untagged packets and forwards traffic that a matching rule should drop. Exposure requires a configured Traffic Policy; the bypass can deliver packets to destinations that the policy was intended to block.

The record

CVE
CVE-2024-9448
Published
May 8, 2025
Updated
Aug 25, 2025
Vendor
Arista Networks
Product
Arista EOS
Classifications
CWE-284
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.30.0 <=4.30.8M
  2. Affected versionversion=4.31.0 <=4.31.5M
  3. Affected versionversion=4.32.0 <=4.32.3M
  4. Affected versionversion=4.33.0 <=4.33.0F

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Arista Networks · Arista EOSversion=4.30.0 <=4.30.8M; version=4.31.0 <=4.31.5M; version=4.32.0 <=4.32.3M; version=4.33.0 <=4.33.0F

Published CVSS scores

7.5Arista NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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