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CVE-2013-3466· NVD / CVE Program· CNA cisco

The EAP-FAST authentication module in Cisco Secure Access Control Server (ACS) 4.x before 4.2.1.15.11, when a RADIUS server configuration is

The EAP-FAST authentication module in Cisco Secure Access Control Server (ACS) 4.x before 4.2.1.15.11, when a RADIUS server configuration is enabled, does not properly parse user identities, which allows remote attackers to execute arbitrary commands via crafted EAP-FAST packets, aka Bug ID CSCui57636.

CriticalCVSS 9.3 · v2.0—No exploit No fix recorded
Published
Aug 29, 2013
Updated
Jun 16, 2026
EPSS
5.1% · 92th percentile
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Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
37 / 40 · 9.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 5.1%

Affected systems

VendorProduct
ciscosecure access control server

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • cisco secure access control serverup to 4.2.1.15.10 inclusive
  • cisco secure access control server4.2.1.15.0
  • cisco secure access control server4.2.1.15.1
  • cisco secure access control server4.2.1.15.2
  • cisco secure access control server4.2.1.15.3
  • cisco secure access control server4.2.1.15.4
  • cisco secure access control server4.2.1.15.6
  • cisco secure access control server4.2.1.15.7
  • cisco secure access control server4.2.1.15.8
  • cisco secure access control server4.2.1.15.9

Same product

cisco: all records

Other highest-scoring records for the same primary product.

  • CVE-2006-4098Stack-based buffer overflow in the CSRadius service in Cisco Secure Access Control Server (ACS) for Windows before 4.1 and ACS Solution Engi
    44Plan
  • CVE-2004-1099Cisco Secure Access Control Server for Windows (ACS Windows) and Cisco Secure Access Control Server Solution Engine (ACS Solution Engine) 3.
    43Plan
  • CVE-2000-1054Buffer overflow in CSAdmin module in CiscoSecure ACS Server 2.4(2) and earlier allows remote attackers to cause a denial of service and poss
    43Plan
  • CVE-2000-1055Buffer overflow in CiscoSecure ACS Server 2.4(2) and earlier allows remote attackers to cause a denial of service and possibly execute arbit
    41Plan
  • CVE-2007-0105Stack-based buffer overflow in the CSAdmin service in Cisco Secure Access Control Server (ACS) for Windows before 4.1 and ACS Solution Engin
    33Monitor
  • CVE-2006-4097Multiple unspecified vulnerabilities in the CSRadius service in Cisco Secure Access Control Server (ACS) for Windows before 4.1 and ACS Solu
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    C · data can be read
    Integrity
    C · data or configuration can be modified
    Availability
    C · the service can be disrupted
    Attack complexity
    M
    Confidentiality impact
    C
    Integrity impact
    C
    Availability impact
    C

    Weakness class (CWE)

    CWE-287 · Improper Authentication

    CVSS vector

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

    nvd-primary

    Root cause

    Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.

    The bug in code

    The whole CWE-287 class

    A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

    Vulnerable

    ts
    app.use("/admin", requireSession, adminRouter);
// Route added later skips the middlewareapp.post("/admin-api/config", updateConfig);

    Fixed

    ts
    const admin = express.Router();admin.use(requireSession, requireRole("admin"));
admin.post("/config", updateConfig);app.use("/admin", admin);

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    Change log

    No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

    References

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records