CVE-2009-2863
Race condition in the Firewall Authentication Proxy feature in Cisco IOS 12.0 through 12.4 allows...
Race condition in the Firewall Authentication Proxy feature in Cisco IOS 12.0 through 12.4 allows remote attackers to bypass authentication, or bypass the consent web page, via a crafted request, aka Bug ID CSCsy15227.
Exploit likelihood
What each source reports
NVD Score used
Race condition in the Firewall Authentication Proxy feature in Cisco IOS 12.0 through 12.4 allows remote attackers to bypass authentication, or bypass the consent web page, via a crafted request, aka Bug ID CSCsy15227.
- Record
CVE-2009-2863- CVSS 2.0
- 7.1 High
AV:N/AC:M/Au:N/C:C/I:N/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List No score
Race condition in the Firewall Authentication Proxy feature in Cisco IOS 12.0 through 12.4 allows remote attackers to bypass authentication, or bypass the consent web page, via a crafted request, aka Bug ID CSCsy15227.
- Record
CVE-2009-2863- Updated
- 2026-11-02
EUVDEUVD-2009-2853 No score
Race condition in the Firewall Authentication Proxy feature in Cisco IOS 12.0 through 12.4 allows remote attackers to bypass authentication, or bypass the consent web page, via a crafted request, aka Bug ID CSCsy15227.
- Record
EUVD-2009-2853- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-r2mm-qr53-2j54 No score
Race condition in the Firewall Authentication Proxy feature in Cisco IOS 12.0 through 12.4 allows...
Race condition in the Firewall Authentication Proxy feature in Cisco IOS 12.0 through 12.4 allows remote attackers to bypass authentication, or bypass the consent web page, via a crafted request, aka Bug ID CSCsy15227.
- Record
GHSA-r2mm-qr53-2j54- Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-2863 is a high vulnerability (CVSS 7.1) in Cisco Ios, published September 28, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.47%, the 84th percentile. No source names a fixed version.
References
securityfocus.com/bid/36491
securitytracker.com/id?1022935
exchange.xforce.ibmcloud.com/vulnerabilities/53453
tools.cisco.com/security/center/viewAlert.x?alertId=18882
osvdb.org/58340
cisco.com/en/US/products/products_security_advisory09186a0080af8132.shtml
nvd.nist.gov/vuln/detail/CVE-2009-2863
github.com/advisories/GHSA-r2mm-qr53-2j54