VDB
CVE-2025-20316
CVE-2025-20316
PUBLISHED
CVSS 5.300000190734863 MEDIUM
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.
EPSS 0.03% · 10.0th percentile
Risk Scores
CVSS 3.1
5.300000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS Score
0.03%
10.0th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco IOS XE Software | 17.7.1, 17.10.1, 17.10.1b |
Exploit Intelligence
- CIRCL seen: CVE-2025-20316 (circl-sighting)
- cisco-sa-cat9k-acl-L4K7VXgD (circl)
Timeline
- Oct 10, 2024 CVE ID Reserved
- Sep 24, 2025 CVE Published
- Sep 24, 2025 CVE Updated
- Sep 25, 2025 EPSS Score
- Sep 26, 2025 PoC Published
- Oct 2, 2025 EPSS Score
- Oct 3, 2025 Coalition ESS Score
- Oct 6, 2025 Coalition ESS Score
- Oct 9, 2025 EPSS Score
- Oct 15, 2025 EPSS Score
- Oct 16, 2025 Coalition ESS Score
- Oct 22, 2025 EPSS Score