The Unicast Reverse Path Forwarding (uRPF) implementation in Cisco Adaptive Security…
Priority LOW 26CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · None · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
The Unicast Reverse Path Forwarding (uRPF) implementation in Cisco Adaptive Security Appliance (ASA) Software 9.3(1.50), 9.3(2.100), 9.3(3), and 9.4(1) mishandles cases where an IP address belongs to an internal interface but is also in the ASA routing table, which allows remote attackers to bypass uRPF validation via spoofed packets, aka Bug ID CSCuv60724.
Why it matters now
EPSS 0.01748 77th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:adaptive_security_appliance_software:9.3\(1.50\):*:*:*:*:*:*:* | 9.3(1.50) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:adaptive_security_appliance_software:9.3\(2.100\):*:*:*:*:*:*:* | 9.3(2.100) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:adaptive_security_appliance_software:9.3\(3\):*:*:*:*:*:*:* | 9.3(3) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:adaptive_security_appliance_software:9.4\(1\):*:*:*:*:*:*:* | 9.4(1) | Vulnerable | Cisco |
- cpe:2.3:o:cisco:adaptive_security_appliance_software:9.3\(1.50\):*:*:*:*:*:*:* Versions 9.3(1.50) Vulnerable ·Cisco
- cpe:2.3:o:cisco:adaptive_security_appliance_software:9.3\(2.100\):*:*:*:*:*:*:* Versions 9.3(2.100) Vulnerable ·Cisco
- cpe:2.3:o:cisco:adaptive_security_appliance_software:9.3\(3\):*:*:*:*:*:*:* Versions 9.3(3) Vulnerable ·Cisco
- cpe:2.3:o:cisco:adaptive_security_appliance_software:9.4\(1\):*:*:*:*:*:*:* Versions 9.4(1) Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2015-4321
- 2026-10-03 Alias added: GHSA-f88v-743w-mgc8
References
More Cisco Adaptive Security Appliance Software vulnerabilities
- TI-2025-14628 Buffer overflow in Cisco Secure Firewall Adaptive Security Appliance Software KEVCVSS 3.1CRITICAL 9.9
- TI-2016-05454 Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on… KEVCVSS 3.1HIGH 8.8
- TI-2023-06973 Authentication bypass in Cisco Adaptive Security Appliance Software KEVCVSS 3.1CRITICAL 9.1
- TI-2026-82192 Denial of service in Cisco Secure Firewall ASA and FTD SSL VPN KEVCVSS 3.1HIGH 8.6
- TI-2026-16533 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense… KEVCVSS 3.1HIGH 8.6
- TI-2025-14657 Missing authorization in Cisco Secure Firewall Adaptive Security Appliance Software KEVCVSS 3.1HIGH 8.6
Sources
- CVE-2015-4321 · CVE Program
- CVE-2015-4321 · NVD
- FIRST EPSS
- GHSA-f88v-743w-mgc8 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences