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CVE-2009-1155

20
FAUCET Score

CVE-2009-1155 describes an authentication bypass vulnerability affecting Cisco ASA 5500 Series and PIX Security Appliances running specific firmware versions. When the "AAA override-account-disable" option is configured, remote attackers can bypass authentication and establish a VPN session to the ASA device. This vulnerability has a CVSS score of 7.8, indicating high severity, with a network attack vector and low complexity, potentially leading to complete confidentiality compromise. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
7.1CPE matchmatch criteria
cpe:2.3:h:cisco:adaptive_security_appliance_5500:7.1:*:*:*:*:*:*:*
7.2CPE matchmatch criteria
cpe:2.3:h:cisco:adaptive_security_appliance_5500:7.2:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:h:cisco:adaptive_security_appliance_5500:8.0:*:*:*:*:*:*:*
8.1CPE matchmatch criteria
cpe:2.3:h:cisco:adaptive_security_appliance_5500:8.1:*:*:*:*:*:*:*
7.1CPE matchmatch criteria
cpe:2.3:h:cisco:pix:7.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.88%
Probability of exploitation in next 30 days
EPSS Percentile
77.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0188 is in the 60th percentile among its peer group of 51,466 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

osvdb.org / 53441
secunia.com / advisories/34607
cisco.com / en/US/products/products_security_advisory09186a0080a994f6.shtml
PatchVendor Advisory
securityfocus.com / bid/34429
securitytracker.com / id
vupen.com / english/advisories/2009/0981