CVE-2009-1165· NVD / CVE Program· CNA cisco

Memory leak on the Cisco Wireless LAN Controller (WLC) platform 4.x before 4.2.205.0, 5.1 before 5.1.163.0, and 5.0 and 5.2 before 5.2.178.0

Memory leak on the Cisco Wireless LAN Controller (WLC) platform 4.x before 4.2.205.0, 5.1 before 5.1.163.0, and 5.0 and 5.2 before 5.2.178.0, as used in Cisco 1500 Series, 2000 Series, 2100 Series, 4100 Series, 4200 Series, and 4400 Series Wireless Services Modules (WiSM), WLC Modules for Integrated Services Routers, and Catalyst 3750G Integrated Wireless LAN Controllers, allows remote attackers to cause a denial of service (memory consumption and device reload) via SSH management connections, aka Bug ID CSCsw40789.

HighCVSS 7.8 · v2.0—No exploit No fix recorded

Published: Jul 29, 2009
Updated: Jun 16, 2026
EPSS: 1.6% · 75th percentile
CWE: CWE-399

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Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 1.6%

Noroxi analysis

No Noroxi analysis for this record yet

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Affected systems

Vendor	Product	CPE
cisco	catalyst 3750g	cpe:2.3:h:cisco:catalyst_3750g
cisco	cisco 1500 wireless lan controller	cpe:2.3:h:cisco:cisco_1500_wireless_lan_controller
cisco	cisco 2000 wireless lan controller	cpe:2.3:h:cisco:cisco_2000_wireless_lan_controller
cisco	cisco 2100 wireless lan controller	cpe:2.3:h:cisco:cisco_2100_wireless_lan_controller
cisco	cisco 4100 wireless lan controller	cpe:2.3:h:cisco:cisco_4100_wireless_lan_controller
cisco	cisco 4200 wireless lan controller	cpe:2.3:h:cisco:cisco_4200_wireless_lan_controller
cisco	cisco 4400 wireless lan controller	cpe:2.3:h:cisco:cisco_4400_wireless_lan_controller

Affected versions

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

cisco catalyst 3750gall versions
cisco cisco 1500 wireless lan controller4.1
cisco cisco 1500 wireless lan controller4.1m
cisco cisco 1500 wireless lan controller4.2
cisco cisco 1500 wireless lan controller5.0
cisco cisco 1500 wireless lan controller5.1
cisco cisco 1500 wireless lan controller5.2
cisco cisco 2000 wireless lan controller4.1
cisco cisco 2000 wireless lan controller4.1m
cisco cisco 2000 wireless lan controller4.2
cisco cisco 2000 wireless lan controller5.0
cisco cisco 2000 wireless lan controller5.1
cisco cisco 2000 wireless lan controller5.2
cisco cisco 2100 wireless lan controller4.1
cisco cisco 2100 wireless lan controller4.1m
cisco cisco 2100 wireless lan controller4.2
cisco cisco 2100 wireless lan controller5.0
cisco cisco 2100 wireless lan controller5.1
cisco cisco 2100 wireless lan controller5.2
cisco cisco 4100 wireless lan controller4.1

Same product

cisco: all records

Other highest-scoring records for the same primary product.

CVE-2009-1167Unspecified vulnerability on the Cisco Wireless LAN Controller (WLC) platform 4.x before 4.2.205.0 and 5.x before 5.2.191.0, as used in Cisc
41Plan
CVE-2009-1164The administrative web interface on the Cisco Wireless LAN Controller (WLC) platform 4.2 before 4.2.205.0 and 5.x before 5.2.178.0, as used
31Monitor

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

No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: C · the service can be disrupted

Attack complexity: Low
Confidentiality impact: None
Integrity impact: None
Availability impact: C

Weakness class (CWE)

CWE-399 · Resource Management Errors

CVSS vector

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

nvd-primary

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

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