How severe is CVE-2009-1155?

CVE-2009-1155 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2009-1155 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1155?

CVE-2009-1155 primarily affects Cisco Adaptive Security Appliance 5500. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1155?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2009-1155 published?

CVE-2009-1155 was published on 2009-04-09 and last updated on 2026-06-16.

CVE-2009-1155

CVE-2009-1155 is a high-severity vulnerability in Cisco Adaptive Security Appliance 5500 with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Cisco Adaptive Security Appliance 5500
Published: 2009-04-09
Last modified: 2026-06-16

Description

Cisco Adaptive Security Appliances (ASA) 5500 Series and PIX Security Appliances 7.1(1) through 7.1(2)82, 7.2 before 7.2(4)27, 8.0 before 8.0(4)25, and 8.1 before 8.1(2)15, when AAA override-account-disable is entered in a general-attributes field, allow remote attackers to bypass authentication and establish a VPN session to an ASA device via unspecified vectors.

Frequently asked questions

What is CVE-2009-1155?: Cisco Adaptive Security Appliances (ASA) 5500 Series and PIX Security Appliances 7.1(1) through 7.1(2)82, 7.2 before 7.2(4)27, 8.0 before 8.0(4)25, and 8.1 before 8.1(2)15, when AAA override-account-disable is entered in a general-attributes field, allow remote attackers to bypass authentication and establish a VPN session to an ASA device via unspecified vectors.
How severe is CVE-2009-1155?: CVE-2009-1155 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2009-1155 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1155?: CVE-2009-1155 primarily affects Cisco Adaptive Security Appliance 5500. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1155?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2009-1155 published?: CVE-2009-1155 was published on 2009-04-09 and last updated on 2026-06-16.

References

Affected products (8)

cpe:2.3:h:cisco:adaptive_security_appliance_5500:7.1:*:*:*:*:*:*:*
cpe:2.3:h:cisco:adaptive_security_appliance_5500:7.2:*:*:*:*:*:*:*
cpe:2.3:h:cisco:adaptive_security_appliance_5500:8.0:*:*:*:*:*:*:*
cpe:2.3:h:cisco:adaptive_security_appliance_5500:8.1:*:*:*:*:*:*:*
cpe:2.3:h:cisco:pix:7.1:*:*:*:*:*:*:*
cpe:2.3:h:cisco:pix:7.2:*:*:*:*:*:*:*
cpe:2.3:h:cisco:pix:8.0:*:*:*:*:*:*:*
cpe:2.3:h:cisco:pix:8.1:*:*:*:*:*:*:*

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Other CWE-287 (Improper Authentication) vulnerabilities

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