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CVE-2009-4455

18
FAUCET Score

CVE-2009-4455 describes a vulnerability in Cisco ASA 5500 Series Adaptive Security Appliances (versions 7.0 through 8.2) where the default configuration allows authenticated users to bypass access restrictions. By crafting a ROT13-encoded URL, attackers could access unauthorized backend servers, despite the vendor clarifying that the bookmark feature is not a security control. This vulnerability has a CVSS score of 6.5, indicating a medium severity. It can be exploited remotely with low attack complexity by an authenticated user, potentially leading to partial compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, nor is exploit code publicly available in Metasploit, Nuclei, or ExploitDB. The CVE has received minimal community attention and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
7.0CPE matchmatch criteria
cpe:2.3:h:cisco:adaptive_security_appliance_5500:7.0:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.5MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Exploitability Score
8.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.31%
Probability of exploitation in next 30 days
EPSS Percentile
67.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0131 is in the 81st percentile among its peer group of 21,977 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, 0.0 Mastodon, and 0.1 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

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

osvdb.org / 61132
secunia.com / advisories/37710
Vendor Advisory
tools.cisco.com / security/center/viewAlert.x
Vendor Advisory
securityfocus.com / archive/1/508530/100/0/threaded
securitytracker.com / id
vupen.com / english/advisories/2009/3577
Vendor Advisory