CVE-2009-0636
Unspecified vulnerability in Cisco IOS 12.0 through 12.4, when SIP voice services are enabled,...
Unspecified vulnerability in Cisco IOS 12.0 through 12.4, when SIP voice services are enabled, allows remote attackers to cause a denial of service (device crash) via a valid SIP message.
Exploit likelihood
What each source reports
NVD Score used
Unspecified vulnerability in Cisco IOS 12.0 through 12.4, when SIP voice services are enabled, allows remote attackers to cause a denial of service (device crash) via a valid SIP message.
- Record
CVE-2009-0636- CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Updated
- 2026-11-02
CVE List No score
Unspecified vulnerability in Cisco IOS 12.0 through 12.4, when SIP voice services are enabled, allows remote attackers to cause a denial of service (device crash) via a valid SIP message.
- Record
CVE-2009-0636- Updated
- 2026-11-02
EUVDEUVD-2009-0639 No score
Unspecified vulnerability in Cisco IOS 12.0 through 12.4, when SIP voice services are enabled, allows remote attackers to cause a denial of service (device crash) via a valid SIP message.
- Record
EUVD-2009-0639- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hvr2-xgj6-r6c3 No score
Unspecified vulnerability in Cisco IOS 12.0 through 12.4, when SIP voice services are enabled,...
Unspecified vulnerability in Cisco IOS 12.0 through 12.4, when SIP voice services are enabled, allows remote attackers to cause a denial of service (device crash) via a valid SIP message.
- Record
GHSA-hvr2-xgj6-r6c3- 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-2009-0636 is a high vulnerability (CVSS 7.8) in Cisco Ios, published March 27, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.94%, the 87th percentile. No source names a fixed version.
References
cisco.com/en/US/products/products_security_advisory09186a0080a904c0.shtml
securityfocus.com/bid/34243
secunia.com/advisories/34438
exchange.xforce.ibmcloud.com/vulnerabilities/49421
securitytracker.com/id?1021902
vupen.com/english/advisories/2009/0851
nvd.nist.gov/vuln/detail/CVE-2009-0636
github.com/advisories/GHSA-hvr2-xgj6-r6c3