CVE-2009-0628

9.0 HIGH 2% exploit odds Fix listed Disclosure Network gear

What it is

Memory leak in the SSLVPN feature in Cisco IOS 12.3 through 12.4 allows remote attackers to cause a denial of service (memory consumption and device crash) by disconnecting an SSL session in an abnormal manner, leading to a Transmission Control Block (TCB) leak.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of service disruption.
Exploit odds: 1.9% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2009-03-27 16:30 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:05 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 1.9% in the next 30 days (EPSS).
Severity: 9.0 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2009-03-27 16:30 UTC
Last modified: 2026-06-16 23:05 UTC
Exploit probability: 1.9% · EPSS, next 30 days
Weakness: CWE-200 · Information exposure
Record status: Modified

Affected

Cisco iOS 12.3
Cisco iOS 12.4

Attack profile CVSS 2.0 · 9.0

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: Partial
Integrity: Partial
Availability: Complete

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2009-0628.md and follow it. Check whether this project is affected by CVE-2009-0628. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

· More options · Status badge

Download Square Reddit

Fix and advisories

References

NVD record · CVE.org record