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CVE-2015-0609

19
FAUCET Score

CVE-2015-0609 describes a race condition within the Common Classification Engine (CCE) of Cisco IOS versions 15.4(2)T3 and earlier. This vulnerability allows remote attackers to trigger a denial of service, specifically a device reload, by sending crafted network traffic that exploits improper timing in process and Cisco Express Forwarding (CEF) switching. With a CVSS score of 7.1, this vulnerability is considered high severity, requiring medium attack complexity but leading to a complete loss of availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 15.4\(2\)t3CPE matchmatch criteria
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
15.4\(1\)tCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.4\(1\)t:*:*:*:*:*:*:*
15.4\(1\)t1CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.4\(1\)t1:*:*:*:*:*:*:*
15.4\(1\)t2CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.4\(1\)t2:*:*:*:*:*:*:*
15.4\(1\)t3CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.4\(1\)t3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.1HIGH

AV:N/AC:M/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.17%
Probability of exploitation in next 30 days
EPSS Percentile
64.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0117 is in the 26th percentile among its peer group of 8,920 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

exchange.xforce.ibmcloud.com / vulnerabilities/100809
tools.cisco.com / security/center/content/CiscoSecurityNotice/CVE-2015-0609
Vendor Advisory
tools.cisco.com / security/center/viewAlert.x
Vendor Advisory
securityfocus.com / bid/72564
securitytracker.com / id/1031731