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.

◆ AI Analysis — automated analysis, not human-reviewed

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

Is this CVE in your environment?

BreachSpider monitors your ICS/OT environment for vulnerabilities like this one. No agents or network access required. Free to start.

Check My Environment →

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 2026-09-25.

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	2026-06-16
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	Affected Versions
Cisco	Asa 5580	`≤ 8.1(1)`

Remediation

View Vendor Advisory →

Remediation Priority: MEDIUM

Threat Intelligence

● Threat Intelligence Validated: October 2026 | Threat Age: 5942 Days

CISA known-exploited	Not in KEV catalog
Public Exploit	Not confirmed
PoC Code	Not confirmed

AI Enrichment Record — provenance & audit hash

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

Related CVEs affecting Cisco

CVE-2007-2036 10.0 The SNMP implementation in the Cisco Wireless LAN Controller (WLC) before 200... CVE-2007-4241 10.0 Buffer overflow in ldcconn in Hewlett-Packard (HP) Controller for Cisco Local... CVE-2009-0617 10.0 Cisco Application Networking Manager (ANM) before 2.0 uses a default MySQL ro... CVE-2009-1167 10.0 Unspecified vulnerability on the Cisco Wireless LAN Controller (WLC) platform... CVE-2010-0570 10.0 Cisco Digital Media Manager (DMM) 5.0.x and 5.1.x has a default password for ...

View all Cisco CVEs →

Critical Severity - Know Your Exposure

A CVSS 10.0 vulnerability in your ICS environment cannot wait. BreachSpider maps critical CVEs to your specific assets and tells you what to fix first.

Create a free account →