CVE-2025-20339
published 2025-09-24CVE-2025-20339: A vulnerability in the access control list (ACL) processing of IPv4 packets of Cisco SD-WAN vEdge Software could allow an unauthenticated, remote attacker to…
PriorityP337medium5.8CVSS 3.1
AVNACLPRNUINSCCNILAN
EPSS
0.29%
21.6th percentile
A vulnerability in the access control list (ACL) processing of IPv4 packets of Cisco SD-WAN vEdge Software could allow an unauthenticated, remote attacker to bypass a configured ACL.
This vulnerability is due to the improper enforcement of the implicit deny all at the end of a configured ACL. An attacker could exploit this vulnerability by attempting to send unauthorized traffic to an interface on an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.
Affected
45 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_sd-wan_vedge_cloud | — | — |
| cisco | cisco_sd-wan_vedge_cloud | — | — |
| cisco | cisco_sd-wan_vedge_cloud | — | — |
| cisco | cisco_sd-wan_vedge_cloud | — | — |
| cisco | cisco_sd-wan_vedge_cloud | — | — |
| cisco | cisco_sd-wan_vedge_cloud | — | — |
| cisco | cisco_sd-wan_vedge_cloud | — | — |
| cisco | cisco_sd-wan_vedge_cloud | — | — |
| cisco | cisco_sd-wan_vedge_cloud | — | — |
| cisco | cisco_sd-wan_vedge_cloud | — | — |
| cisco | cisco_sd-wan_vedge_cloud | — | — |
| cisco | cisco_sd-wan_vedge_cloud | — | — |
| cisco | cisco_sd-wan_vedge_router | — | — |
| cisco | cisco_sd-wan_vedge_router | — | — |
| cisco | cisco_sd-wan_vedge_router | — | — |
| cisco | cisco_sd-wan_vedge_router | — | — |
| cisco | cisco_sd-wan_vedge_router | — | — |
| cisco | cisco_sd-wan_vedge_router | — | — |
| cisco | cisco_sd-wan_vedge_router | — | — |
| cisco | cisco_sd-wan_vedge_router | — | — |
| cisco | cisco_sd-wan_vedge_router | — | — |
| cisco | cisco_sd-wan_vedge_router | — | — |
| cisco | cisco_sd-wan_vedge_router | — | — |
| cisco | cisco_sd-wan_vedge_router | — | — |
| cisco | cisco_sd-wan_vedge_router | — | — |
CVSS provenance
nvdv3.15.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
vendor_cisco5.8MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Cisco
Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability
vendor_cisco·2025-09-24·CVSS 5.8
CVE-2025-20339 [MEDIUM] CWE-284 Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability
Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability
A vulnerability in the access control list (ACL) processing of IPv4 packets of Cisco SD-WAN vEdge Software could allow an unauthenticated, remote attacker to bypass a configured ACL.
This vulnerability is due to the improper enforcement of the implicit deny all at the end of a configured ACL. An attacker could exploit this vulnerability by attempting to send unauthorized traffic to an interface on an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.
Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability.
This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center
Cisco
Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability
vendor_cisco·CVSS 3.1
CVE-2025-20339 Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability
CVE-2025-20339: Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability
A vulnerability in the access control list (ACL) processing of IPv4 packets of Cisco SD-WAN vEdge Software could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to the improper enforcement of the implicit deny all at the end of a configured ACL. An attacker could exploit this vulnerability by attempting to send unauthorized traffic to an interface on an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device. Cisco has released software updates that address this vulnerability. There are
CVSS: 3.1
CWE: CWE-284, CWE-284
Bug IDs: CSCwo83136
GHSA
GHSA-97xx-3c9q-f5rx: A vulnerability in the access control list (ACL) processing of IPv4 packets of Cisco SD-WAN vEdge Software could allow an unauthenticated, remote atta
ghsa_unreviewed·2025-09-24
CVE-2025-20339 [MEDIUM] CWE-284 GHSA-97xx-3c9q-f5rx: A vulnerability in the access control list (ACL) processing of IPv4 packets of Cisco SD-WAN vEdge Software could allow an unauthenticated, remote atta
A vulnerability in the access control list (ACL) processing of IPv4 packets of Cisco SD-WAN vEdge Software could allow an unauthenticated, remote attacker to bypass a configured ACL.
This vulnerability is due to the improper enforcement of the implicit deny all at the end of a configured ACL. An attacker could exploit this vulnerability by attempting to send unauthorized traffic to an interface on an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-09-24
Published