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CVE-2009-0628

23
FAUCET Score

CVE-2009-0628 describes a memory leak vulnerability in the SSLVPN feature of Cisco IOS versions 12.3 through 12.4. This flaw allows remote attackers to trigger a denial of service by abnormally disconnecting SSL sessions, leading to a Transmission Control Block (TCB) leak, memory exhaustion, and device crashes. With a CVSS score of 9.0, it is a critical vulnerability, easily exploitable over the network without authentication, and can lead to complete system compromise. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
12.3CPE matchmatch criteria
cpe:2.3:o:cisco:cisco_ios:12.3:*:*:*:*:*:*:*
12.3CPE matchmatch criteria
cpe:2.3:o:cisco:cisco_ios:12.3:b:*:*:*:*:*:*
12.3CPE matchmatch criteria
cpe:2.3:o:cisco:cisco_ios:12.3:bc:*:*:*:*:*:*
12.3CPE matchmatch criteria
cpe:2.3:o:cisco:cisco_ios:12.3:bw:*:*:*:*:*:*
12.3CPE matchmatch criteria
cpe:2.3:o:cisco:cisco_ios:12.3:eu:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.0HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:C

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
8.5
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.93%
Probability of exploitation in next 30 days
EPSS Percentile
77.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0192 is in the 61st percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

Remediation records are not available for this CVE.

References

secunia.com / advisories/34438
Vendor Advisory
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/49427
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12092
cisco.com / en/US/products/products_security_advisory09186a0080a90424.shtml
Vendor Advisory
cisco.com / en/US/products/products_security_advisory09186a0080a90469.shtml
Vendor Advisory
securityfocus.com / bid/34239
vupen.com / english/advisories/2009/0851
Vendor Advisory