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CVE-2009-5009

17
FAUCET Score

CVE-2009-5009 describes a double free vulnerability in OpenConnect versions prior to 1.40. This flaw allows a remote AnyConnect SSL VPN server to trigger a denial of service (application crash) or potentially other unspecified impacts by sending a specially crafted DTLS Cipher option during a reconnect. With a CVSS score of 5.0, it is considered a medium severity vulnerability, requiring no authentication and having low attack complexity, but primarily leading to availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.30CPE matchmatch criteria
cpe:2.3:a:infradead:openconnect:*:*:*:*:*:*:*:*
1.00CPE matchmatch criteria
cpe:2.3:a:infradead:openconnect:1.00:*:*:*:*:*:*:*
1.10CPE matchmatch criteria
cpe:2.3:a:infradead:openconnect:1.10:*:*:*:*:*:*:*
1.20CPE matchmatch criteria
cpe:2.3:a:infradead:openconnect:1.20:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.98%
Probability of exploitation in next 30 days
EPSS Percentile
58.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0098 is in the 37th percentile among its peer group of 23,701 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

infradead.org / openconnect.html