How severe is CVE-2024-20465?

CVE-2024-20465 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2024-20465 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-20465?

CVE-2024-20465 primarily affects Cisco Ios. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-20465?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-20465 have an EU (EUVD) identifier?

Yes. CVE-2024-20465 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18180.

When was CVE-2024-20465 published?

CVE-2024-20465 was published on 2024-09-25 and last updated on 2026-06-17.

CVE-2024-20465

CVE-2024-20465 is a medium-severity vulnerability in Cisco Ios with a CVSS 3.x base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: Medium (CVSS 3.x base score 5.8)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-18180
Weakness: CWE-284
Affected product: Cisco Ios
Published: 2024-09-25
Last modified: 2026-06-17

Description

A vulnerability in the access control list (ACL) programming of Cisco IOS Software running on Cisco Industrial Ethernet 4000, 4010, and 5000 Series Switches could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to the incorrect handling of IPv4 ACLs on switched virtual interfaces when an administrator enables and disables Resilient Ethernet Protocol (REP). An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.

Frequently asked questions

What is CVE-2024-20465?: A vulnerability in the access control list (ACL) programming of Cisco IOS Software running on Cisco Industrial Ethernet 4000, 4010, and 5000 Series Switches could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to the incorrect handling of IPv4 ACLs on switched virtual interfaces when an administrator enables and disables Resilient Ethernet Protocol (REP). An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.
How severe is CVE-2024-20465?: CVE-2024-20465 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2024-20465 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-20465?: CVE-2024-20465 primarily affects Cisco Ios. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-20465?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-20465 have an EU (EUVD) identifier?: Yes. CVE-2024-20465 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18180.
When was CVE-2024-20465 published?: CVE-2024-20465 was published on 2024-09-25 and last updated on 2026-06-17.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-repacl-9eXgnBpD

Affected products (4)

cpe:2.3:o:cisco:ios:15.2\(8\)e2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(8\)e3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(8\)e4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(8\)e5:*:*:*:*:*:*:*

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