Vulnerability-Lookup

CVE-2025-20316 (GCVE-0-2025-20316)

Vulnerability from cvelistv5 – Published: 2025-09-24 17:16 – Updated: 2025-09-24 17:28

Summary

A vulnerability in the access control list (ACL) programming of Cisco IOS XE Software for Cisco Catalyst 9500X and 9600X Series Switches could allow an unauthenticated, remote attacker to bypass a configured ACL on an affected device. This vulnerability is due to the flooding of traffic from an unlearned MAC address on a switch virtual interface (SVI) that has an egress ACL applied. An attacker could exploit this vulnerability by causing the VLAN to flush its MAC address table. This condition can also occur if the MAC address table is full. A successful exploit could allow the attacker to bypass an egress ACL on an affected device.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-09-24 17:28 UTC

CWE

CWE-284 - Improper Access Control

Assigner

cisco mitre root

References

1 reference

URL	Tags
https://sec.cloudapps.cisco.com/security/center/c…

Impacted products

1 product

Vendor	Product	Version	CPE status
Cisco	Cisco IOS XE Software	Affected: 17.7.1 Affected: 17.10.1 Affected: 17.10.1b Affected: 17.8.1 Affected: 17.9.1 Affected: 17.9.2 Affected: 17.9.3 Affected: 17.9.4 Affected: 17.9.5 Affected: 17.9.4a Affected: 17.9.6 Affected: 17.9.6a Affected: 17.9.7 Affected: 17.11.1 Affected: 17.12.1 Affected: 17.12.2 Affected: 17.12.3 Affected: 17.12.4 Affected: 17.12.5 Affected: 17.13.1 Affected: 17.14.1 Affected: 17.15.1 Affected: 17.15.2 Affected: 17.15.3 Affected: 17.15.2b Affected: 17.16.1 Affected: 17.17.1	guessed

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}

BDU:2025-11734 (CVE-2025-20316)

Vulnerability from fstec – Published: 2025-09-26 – Updated: 2025-09-26 – View on bdu.fstec.ru Fixed

Title

Уязвимость компонента access control list (ACL) операционных систем Cisco IOS XE сетевых устройств Catalyst 9500X и 9600X, позволяющая нарушителю обойти список контроля доступа

Summary

Уязвимость компонента access control list (ACL) операционных систем Cisco IOS XE сетевых устройств Catalyst 9500X и 9600X связана с неправильным контролем доступа. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, обойти список контроля доступа

Severity

5.0 (Medium) CVSS 2.0


                      
                        AV:N/AC:L/Au:N/C:N/I:P/A:N

5.3 (Medium) CVSS 3.1


                      
                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Authorization bypass

Incidents

Being clarified

Remediation

Software update

CWE

CWE-284 - Неправильный контроль доступа

Aliases

CVE-2025-20316, CISCO-SA-CAT9K-ACL-L4K7VXGD

References

1 reference

URL
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/c…

Impacted products

2 products from 2 vendors

Vendors

Cisco Systems, Inc.

Products

Cisco Catalyst 9500 Series Switches, Cisco Catalyst 9600 Series Switches

Versions

- (Cisco Catalyst 9500 Series Switches), - (Cisco Catalyst 9600 Series Switches)

Product types

Network appliance software

Platforms

Cisco Systems, Inc. Cisco IOS XE 17.9.1, Inc. Cisco IOS XE 17.11.1, Inc. Cisco IOS XE 17.12.1, Inc. Cisco IOS XE 17.10.1, Inc. Cisco IOS XE 17.10.1b, Inc. Cisco IOS XE 17.8.1, Inc. Cisco IOS XE 17.9.2, Inc. Cisco IOS XE 17.9.3, Inc. Cisco IOS XE 17.9.4, Inc. Cisco IOS XE 17.9.4a, Inc. Cisco IOS XE 17.7.1, Inc. Cisco IOS XE 17.12.2, Inc. Cisco IOS XE 17.13.1, Inc. Cisco IOS XE 17.14.1, Inc. Cisco IOS XE 17.9.5, Inc. Cisco IOS XE 17.9.6b, Inc. Cisco IOS XE 17.12.3, Inc. Cisco IOS XE 17.12.4, Inc. Cisco IOS XE 17.9.6a, Inc. Cisco IOS XE 17.15.1, Inc. Cisco IOS XE 17.15.2, Inc. Cisco IOS XE 17.15.3, Inc. Cisco IOS XE 17.15.2b, Inc. Cisco IOS XE 17.16.1, Inc. Cisco IOS XE 17.17.1, Inc. Cisco IOS XE 17.9.6, Inc. Cisco IOS XE 17.9.7, Inc. Cisco IOS XE 17.12.5, Inc. Cisco IOS XE 17.18.0EFT

Mitigations

Использование рекомендаций производителя: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD

JSON

To clipboard

{
  "CVSS 2.0": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
  "CVSS 3.0": "AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Cisco Systems, Inc.",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "- (Cisco Catalyst 9500 Series Switches), - (Cisco Catalyst 9600 Series Switches)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f:\nhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "24.09.2025",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "26.09.2025",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "26.09.2025",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2025-11734",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2025-20316, CISCO-SA-cat9k-acl-L4K7VXgD",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Cisco Catalyst 9500 Series Switches, Cisco Catalyst 9600 Series Switches",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "Cisco Systems, Inc. Cisco IOS XE 17.9.1 , Cisco Systems, Inc. Cisco IOS XE 17.11.1 , Cisco Systems, Inc. Cisco IOS XE 17.12.1 , Cisco Systems, Inc. Cisco IOS XE 17.10.1 , Cisco Systems, Inc. Cisco IOS XE 17.10.1b , Cisco Systems, Inc. Cisco IOS XE 17.8.1 , Cisco Systems, Inc. Cisco IOS XE 17.9.2 , Cisco Systems, Inc. Cisco IOS XE 17.9.3 , Cisco Systems, Inc. Cisco IOS XE 17.9.4 , Cisco Systems, Inc. Cisco IOS XE 17.9.4a , Cisco Systems, Inc. Cisco IOS XE 17.7.1 , Cisco Systems, Inc. Cisco IOS XE 17.12.2 , Cisco Systems, Inc. Cisco IOS XE 17.13.1 , Cisco Systems, Inc. Cisco IOS XE 17.14.1 , Cisco Systems, Inc. Cisco IOS XE 17.9.5 , Cisco Systems, Inc. Cisco IOS XE 17.9.6b , Cisco Systems, Inc. Cisco IOS XE 17.12.3 , Cisco Systems, Inc. Cisco IOS XE 17.12.4 , Cisco Systems, Inc. Cisco IOS XE 17.9.6a , Cisco Systems, Inc. Cisco IOS XE 17.15.1 , Cisco Systems, Inc. Cisco IOS XE 17.15.2 , Cisco Systems, Inc. Cisco IOS XE 17.15.3 , Cisco Systems, Inc. Cisco IOS XE 17.15.2b , Cisco Systems, Inc. Cisco IOS XE 17.16.1 , Cisco Systems, Inc. Cisco IOS XE 17.17.1 , Cisco Systems, Inc. Cisco IOS XE 17.9.6 , Cisco Systems, Inc. Cisco IOS XE 17.9.7 , Cisco Systems, Inc. Cisco IOS XE 17.12.5 , Cisco Systems, Inc. Cisco IOS XE 17.18.0EFT ",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 access control list (ACL) \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c Cisco IOS XE \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 Catalyst 9500X \u0438 9600X, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u043e\u0431\u043e\u0439\u0442\u0438 \u0441\u043f\u0438\u0441\u043e\u043a \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041d\u0435\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c \u0434\u043e\u0441\u0442\u0443\u043f\u0430 (CWE-284)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 access control list (ACL) \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c Cisco IOS XE \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 Catalyst 9500X \u0438 9600X \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043d\u0435\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u044b\u043c \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0435\u043c \u0434\u043e\u0441\u0442\u0443\u043f\u0430. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u043e, \u043e\u0431\u043e\u0439\u0442\u0438 \u0441\u043f\u0438\u0441\u043e\u043a \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041d\u0430\u0440\u0443\u0448\u0435\u043d\u0438\u0435 \u0430\u0432\u0442\u043e\u0440\u0438\u0437\u0430\u0446\u0438\u0438",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041f\u041e \u0441\u0435\u0442\u0435\u0432\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e-\u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0433\u043e \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-284",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 5)\n\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 5,3)"
}

CISCO-SA-CAT9K-ACL-L4K7VXGD

Vulnerability from csaf_cisco - Published: 2025-09-24 16:00 - Updated: 2025-09-24 16:00

Summary

Cisco IOS XE Software on Cisco Catalyst 9500X and 9600X Series Switches Virtual Interface Access Control List Bypass Vulnerability

Scope

1 vulnerability in this advisory, including CVE-2025-20316.

CVE-2025-20316

5.3 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Known affected: 29 products

https://software.cisco.com

Open the full advisory

FKIE_CVE-2025-20316

Vulnerability from fkie_nvd - Published: 2025-09-24 18:15 - Updated: 2026-09-26 00:10

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Summary

References

	URL	Tags
	psirt@cisco.com	https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Cisco IOS XE Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "17.7.1"
            },
            {
              "status": "affected",
              "version": "17.10.1"
            },
            {
              "status": "affected",
              "version": "17.10.1b"
            },
            {
              "status": "affected",
              "version": "17.8.1"
            },
            {
              "status": "affected",
              "version": "17.9.1"
            },
            {
              "status": "affected",
              "version": "17.9.2"
            },
            {
              "status": "affected",
              "version": "17.9.3"
            },
            {
              "status": "affected",
              "version": "17.9.4"
            },
            {
              "status": "affected",
              "version": "17.9.5"
            },
            {
              "status": "affected",
              "version": "17.9.4a"
            },
            {
              "status": "affected",
              "version": "17.9.6"
            },
            {
              "status": "affected",
              "version": "17.9.6a"
            },
            {
              "status": "affected",
              "version": "17.9.7"
            },
            {
              "status": "affected",
              "version": "17.11.1"
            },
            {
              "status": "affected",
              "version": "17.12.1"
            },
            {
              "status": "affected",
              "version": "17.12.2"
            },
            {
              "status": "affected",
              "version": "17.12.3"
            },
            {
              "status": "affected",
              "version": "17.12.4"
            },
            {
              "status": "affected",
              "version": "17.12.5"
            },
            {
              "status": "affected",
              "version": "17.13.1"
            },
            {
              "status": "affected",
              "version": "17.14.1"
            },
            {
              "status": "affected",
              "version": "17.15.1"
            },
            {
              "status": "affected",
              "version": "17.15.2"
            },
            {
              "status": "affected",
              "version": "17.15.3"
            },
            {
              "status": "affected",
              "version": "17.15.2b"
            },
            {
              "status": "affected",
              "version": "17.16.1"
            },
            {
              "status": "affected",
              "version": "17.17.1"
            }
          ]
        }
      ],
      "source": "psirt@cisco.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the access control list (ACL) programming of Cisco IOS XE Software for Cisco Catalyst 9500X and 9600X Series Switches could allow an unauthenticated, remote attacker to bypass a configured ACL on an affected device.\r\n\r This vulnerability is due to the flooding of traffic from an unlearned MAC address on a switch virtual interface (SVI) that has an egress ACL applied. An attacker could exploit this vulnerability by causing the VLAN to flush its MAC address table. This condition can also occur if the MAC address table is full. A successful exploit could allow the attacker to bypass an egress ACL on an affected device."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en la programaci\u00f3n de la lista de control de acceso (ACL) de Cisco IOS XE Software para los Switches Cisco Catalyst de las series 9500X y 9600X podr\u00eda permitir a un atacante remoto no autenticado eludir una ACL configurada en un dispositivo afectado.\n\nEsta vulnerabilidad se debe a la inundaci\u00f3n de tr\u00e1fico desde una direcci\u00f3n MAC no aprendida en una interfaz virtual de switch (SVI) que tiene una ACL de salida aplicada. Un atacante podr\u00eda explotar esta vulnerabilidad al hacer que la VLAN vac\u00ede su tabla de direcciones MAC. Esta condici\u00f3n tambi\u00e9n puede ocurrir si la tabla de direcciones MAC est\u00e1 llena. Un exploit exitoso podr\u00eda permitir al atacante eludir una ACL de salida en un dispositivo afectado."
    }
  ],
  "id": "CVE-2025-20316",
  "lastModified": "2026-09-26T00:10:00.127",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "psirt@cisco.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-20316",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-09-24T17:28:32.049852Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-09-24T18:15:36.313",
  "references": [
    {
      "source": "psirt@cisco.com",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Secondary"
    }
  ]
}

GHSA-84GM-4JPH-65CM

Vulnerability from github – Published: 2025-09-24 18:30 – Updated: 2025-09-24 18:30

Details

This vulnerability is due to the flooding of traffic from an unlearned MAC address on a switch virtual interface (SVI) that has an egress ACL applied. An attacker could exploit this vulnerability by causing the VLAN to flush its MAC address table. This condition can also occur if the MAC address table is full. A successful exploit could allow the attacker to bypass an egress ACL on an affected device.

Severity

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2025-20316"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-24T18:15:36Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability in the access control list (ACL) programming of Cisco IOS XE Software for Cisco Catalyst 9500X and 9600X Series Switches could allow an unauthenticated, remote attacker to bypass a configured ACL on an affected device.\n\n This vulnerability is due to the flooding of traffic from an unlearned MAC address on a switch virtual interface (SVI) that has an egress ACL applied. An attacker could exploit this vulnerability by causing the VLAN to flush its MAC address table. This condition can also occur if the MAC address table is full. A successful exploit could allow the attacker to bypass an egress ACL on an affected device.",
  "id": "GHSA-84gm-4jph-65cm",
  "modified": "2025-09-24T18:30:31Z",
  "published": "2025-09-24T18:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-20316"
    },
    {
      "type": "WEB",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

NCSC-2025-0297

Vulnerability from csaf_ncscnl - Published: 2025-09-25 09:20 - Updated: 2025-09-25 10:42

Summary

Kwetsbaarheden verholpen in Cisco IOS en Cisco IOS XE Software

Scope

14 vulnerabilities in this advisory, including CVE-2025-20316.

CVE-2025-20316

A vulnerability in the ACL programming of Cisco IOS XE Software for Catalyst 9500X and 9600X Series Switches allows unauthenticated remote attackers to bypass ACLs via traffic flooding from unlearned MAC addresses on SVIs.

5.3 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Known affected: 7 products

Open the full advisory

WID-SEC-W-2025-2128

Vulnerability from csaf_certbund - Published: 2025-09-24 22:00 - Updated: 2025-09-24 22:00

Summary

Cisco IOS XE: Mehrere Schwachstellen

Severity

Mittel

Scope

3 vulnerabilities in this advisory, including CVE-2025-20316.

CVE-2025-20316

Known affected: 1 product

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2025-20316 (GCVE-0-2025-20316)

BDU:2025-11734 (CVE-2025-20316)

CISCO-SA-CAT9K-ACL-L4K7VXGD

FKIE_CVE-2025-20316

GHSA-84GM-4JPH-65CM

NCSC-2025-0297

WID-SEC-W-2025-2128

Tags

Sightings

Nomenclature

Related by attack behaviour