CVE-2009-4912: Critical – Cisco Adaptive Security Appliances (ASA) 5580 series devices with

CWE Weakness Definitions

CWE-264: Permissions, Privileges, and Access Controls

Broad class covering failures in permission enforcement. Deprecated in favor of CWE-284, CWE-862, CWE-863.

◆ SAGE Intelligence — CITED Relevance Research Team

This vulnerability was disclosed in 2010. A critical vulnerability affects Cisco systems (CVE-2009-4912). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2010-GLOBAL-084312-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions

What is CVE-2009-4912?

This vulnerability was disclosed in 2010. A critical vulnerability affects Cisco systems (CVE-2009-4912). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

What is the CVSS score for CVE-2009-4912?

CVE-2009-4912 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 2.5%.

Is CVE-2009-4912 actively exploited?

No confirmed active exploitation of CVE-2009-4912 as of 2026-05-30.

How do I remediate CVE-2009-4912?

Priority: MEDIUM. Advisory: http://www.cisco.com/en/US/docs/security/asa/asa81/release/notes/asarn812.html

What systems are affected by CVE-2009-4912?

CVE-2009-4912 affects: Cisco.

Vulnerability Details

CVE ID	`CVE-2009-4912`
BSID	`BS-2010-GLOBAL-084312-C` BreachSpider Global ID
CVSS Vector	`AV:N/AC:L/Au:N/C:C/I:C/A:C`
Published	2010-06-29
Last Modified	2026-04-29
ICS Relevance	85%
Weakness (CWE)	Permissions, Privileges, and Access Controls
Domains	NETWORK-INFRA
Source	NVD

Official Description

Cisco Adaptive Security Appliances (ASA) 5580 series devices with software before 8.1(2) complete an SSL handshake with an HTTPS client even if this client is unauthorized, which might allow remote attackers to bypass intended access restrictions via an HTTPS session, aka Bug ID CSCso10876.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: Cisco Adaptive Security Appliances (ASA) 5580 series devices with software before 8.1(2) complete an SSL handshake with an HTTPS client even if this client is unauthorized, which might allow remote attackers to bypass intended access restrictions via an HTTPS session, aka Bug ID CSCso10876. CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

Exploitation Likelihood: LOW

Affected Products

Vendor	Product	Fixed Version
Cisco	Asa 5580	—

Remediation

View Vendor Advisory →

Remediation Priority: MEDIUM

Threat Intelligence

● Threat Intelligence Validated: August 2026 | Threat Age: 5879 Days

CISA KEV	Not in KEV catalog
Public Exploit	Not confirmed
PoC Code	Not confirmed

SAGE Enrichment Record — provenance & audit hash

Model	`rule-based-v1`
Confidence	MEDIUM
Enriched At	2026-05-24
SHA-512 Audit Hash	`5b086d109c806362b5209097eb5782998e68bb144622fe37865f297f1cef3b0d91456878629beac0fac8f1a9307da8d500fc9a0daa58b4af61026c59a28a2c37`

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