# What is CVE-2005-0356?

> CVE-2005-0356 is a medium-severity flaw (CVSS 5.0) in Agent Desktop from Cisco, published on 31 May 2005. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 83%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2005-0356

## At a glance

- **Verdict:** Fix this soon. Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month.
- **Precursor Intelligence risk score:** 59 out of 100 (Medium); action: Plan remediation. Kept up to date as the evidence changes.
- **Severity:** Medium (CVSS 5.0 out of 10)
- **Known to be exploited:** No, not on the list of flaws known to be exploited today
- **Chance of use in the next 30 days:** 83% (latest exploit-likelihood forecast)
- **Published:** 31 May 2005
- **Record last updated:** 16 June 2026
- **Main product:** Agent Desktop from Cisco
- **Affected products:** 76

## What is CVE-2005-0356? In plain terms

It can be attacked from anywhere on the internet without logging in. If it works, the attacker can slow it down.

### The official description

Multiple TCP implementations with Protection Against Wrapped Sequence Numbers (PAWS) with the timestamps option enabled allow remote attackers to cause a denial of service (connection loss) via a spoofed packet with a large timer value, which causes the host to discard later packets because they appear to be too old.

### What kind of flaw is it?

- Unknown: Unknown

### How an attack on it works

- Where an attacker can be: Anywhere on the internet
- How hard it is to pull off: Easy: no special conditions
- Login needed first: No login needed
- What an attacker gets: Can slow it down

Severity vector: `AV:N/AC:L/Au:N/C:N/I:N/A:P`

## Is CVE-2005-0356 being exploited? Not that we know of

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 83%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 83%, 83%, 83%, 83%, 83%, 83%, 83%.

### Timeline

- 31 May 2005: Published
- 16 June 2026: Record last updated

### How Precursor Intelligence ranks it

CVE-2005-0356 scores **59 out of 100 (Medium)**, with the action "Plan remediation".

Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less:

- Evidence it is being exploited: biggest factor
- How severe it is: strong factor
- How widely exposed it is: smaller factor
- Threat activity around it: smaller factor

85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it.

## Who is affected by CVE-2005-0356?

The published record lists 76 products.

- [Agent Desktop](https://www.precursorintelligence.com/product/cisco/agent_desktop) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): all versions
- [FreeBSD](https://www.precursorintelligence.com/product/freebsd/freebsd) by [FreeBSD](https://www.precursorintelligence.com/vendors/freebsd) (Operating system): 1.1.5.1, 2.0, 2.0.5, 2.1.0, 2.1.5, 2.1.6, 2.1.6.1, 2.1.7.1, 2.2, 2.2.2, 2.2.3, 2.2.4, 2.2.5, 2.2.6, 2.2.8, 3.0, 3.0-releng, 3.1, 3.2, 3.3, 3.4, 3.5, 3.5-stable, 3.5.1, 3.5.1-release, 3.5.1-stable, 4.0-alpha, 4.0, 4.0-releng, 4.1, 4.1.1, 4.1.1-release, 4.1.1-stable, 4.2, 4.2-stable, 4.3, 4.3-release, 4.3-release_p38, 4.3-releng, 4.3-stable and 52 more
- [Secure Access Control Server](https://www.precursorintelligence.com/product/cisco/secure_access_control_server) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): 2.0, 2.1, 2.3, 2.3.5.1, 2.3.6.1, 2.4, 2.5, 2.6, 2.6.2, 2.6.3, 2.6.4, 2.42, 3.2(1.20), 3.2(1), 3.2(2), 3.2(3), 3.3(1), 3.0, 3.0.1, 3.0.3, 3.1, 3.1.1, 3.2, 3.2.1, 3.2.2, 3.3, 3.3.1, 3.3.2
- [Tmos](https://www.precursorintelligence.com/product/f5/tmos) by [F5](https://www.precursorintelligence.com/vendors/f5) (Operating system): 4.0, 4.2, 4.3, 4.4, 4.5, 4.5.6, 4.5.9, 4.5.10, 4.5.11, 4.5.12, 4.6, 4.6.2, 9.0, 9.0.1, 9.0.2, 9.0.3, 9.0.4, 9.0.5
- [Unity Server](https://www.precursorintelligence.com/product/cisco/unity_server) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): 2.0, 2.1, 2.2, 2.3, 2.4, 2.46, 3.0, 3.1, 3.2, 3.3, 4.0
- [Call Manager](https://www.precursorintelligence.com/product/cisco/call_manager) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): 1.0, 2.0, 3.1(2), 3.1(3a), 3.3(3), 3.0, 3.1, 3.2, 3.3, 4.0
- [OpenBSD](https://www.precursorintelligence.com/product/openbsd/openbsd) by [OpenBSD](https://www.precursorintelligence.com/vendors/openbsd) (Operating system): 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6
- [Sn 5428 Storage Router](https://www.precursorintelligence.com/product/cisco/sn_5428_storage_router) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Operating system): 2-3.3.1-k9, 2-3.3.2-k9, 2.5.1-k9, 3.2.1-k9, 3.2.2-k9, 3.3.1-k9, 3.3.2-k9
- [Personal Assistant](https://www.precursorintelligence.com/product/cisco/personal_assistant) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): 1.3(1), 1.3(2), 1.3(3), 1.3(4), 1.4(1), 1.4(2)
- [Sn 5420 Storage Router Firmware](https://www.precursorintelligence.com/product/cisco/sn_5420_storage_router_firmware) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Operating system): 1.1(2), 1.1(3), 1.1(4), 1.1(5), 1.1(7), 1.1.3
- [Windows 2003 Server](https://www.precursorintelligence.com/product/microsoft/windows_2003_server) by [Microsoft](https://www.precursorintelligence.com/vendors/microsoft) (Operating system): enterprise, enterprise_64-bit, r2, standard, standard_64-bit, web
- [Ciscoworks Cd1](https://www.precursorintelligence.com/product/cisco/ciscoworks_cd1) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Operating system): 1st, 2nd, 3rd, 4th, 5th
- [Webns](https://www.precursorintelligence.com/product/cisco/webns) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): 7.10_(05.07)s, 7.20_(03.09)s, 7.20_(03.10)s, 7.30_(00.08)s, 7.30_(00.09)s
- [Callpilot](https://www.precursorintelligence.com/product/nortel/callpilot) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Application): 200i, 201i, 702t, 703t
- [Alaxala Networks](https://www.precursorintelligence.com/product/alaxala/alaxala_networks) by [Alaxala](https://www.precursorintelligence.com/vendors/alaxala) (Hardware): ax5400s, ax7800r, ax7800s
- [Business Communications Manager](https://www.precursorintelligence.com/product/nortel/business_communications_manager) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Application): 200, 400, 1000
- [Ciscoworks Common Management Foundation](https://www.precursorintelligence.com/product/cisco/ciscoworks_common_management_foundation) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): 2.0, 2.1, 2.2
- [Ciscoworks Access Control List Manager](https://www.precursorintelligence.com/product/cisco/ciscoworks_access_control_list_manager) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): 1.5, 1.6
- [Conference Connection](https://www.precursorintelligence.com/product/cisco/conference_connection) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Operating system): 1.1(1), 1.2
- [Mgx 8230](https://www.precursorintelligence.com/product/cisco/mgx_8230) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Operating system): 1.2.10, 1.2.11
- [Mgx 8250](https://www.precursorintelligence.com/product/cisco/mgx_8250) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Operating system): 1.2.10, 1.2.11
- [Universal Signaling Point](https://www.precursorintelligence.com/product/nortel/universal_signaling_point) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Hardware): compact_lite, 5200
- [7220 WLAN Access Point](https://www.precursorintelligence.com/product/nortel/7220_wlan_access_point) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Hardware): all versions
- [7250 WLAN Access Point](https://www.precursorintelligence.com/product/nortel/7250_wlan_access_point) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Hardware): all versions
- [Aironet Ap1200](https://www.precursorintelligence.com/product/cisco/aironet_ap1200) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Aironet Ap350](https://www.precursorintelligence.com/product/cisco/aironet_ap350) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Alaxala](https://www.precursorintelligence.com/product/hitachi/alaxala) by [Hitachi](https://www.precursorintelligence.com/vendors/hitachi) (Application): ax
- [Ciscoworks 1105 Hosting Solution Engine](https://www.precursorintelligence.com/product/cisco/ciscoworks_1105_hosting_solution_engine) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Operating system): all versions
- [Ciscoworks 1105 Wireless LAN Solution Engine](https://www.precursorintelligence.com/product/cisco/ciscoworks_1105_wireless_lan_solution_engine) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Operating system): all versions
- [Ciscoworks Common Services](https://www.precursorintelligence.com/product/cisco/ciscoworks_common_services) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): 2.2
- [Ciscoworks Lms](https://www.precursorintelligence.com/product/cisco/ciscoworks_lms) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): 1.3
- [Ciscoworks VPN Security Management Solution](https://www.precursorintelligence.com/product/cisco/ciscoworks_vpn_security_management_solution) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): all versions
- [Ciscoworks Windows](https://www.precursorintelligence.com/product/cisco/ciscoworks_windows) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): all versions
- [Ciscoworks Windows Wug](https://www.precursorintelligence.com/product/cisco/ciscoworks_windows_wug) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Operating system): all versions
- [Contact Center](https://www.precursorintelligence.com/product/nortel/contact_center) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Application): all versions
- [Content Services Switch 11000](https://www.precursorintelligence.com/product/cisco/content_services_switch_11000) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Content Services Switch 11050](https://www.precursorintelligence.com/product/cisco/content_services_switch_11050) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Content Services Switch 11150](https://www.precursorintelligence.com/product/cisco/content_services_switch_11150) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Content Services Switch 11500](https://www.precursorintelligence.com/product/cisco/content_services_switch_11500) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Content Services Switch 11501](https://www.precursorintelligence.com/product/cisco/content_services_switch_11501) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Content Services Switch 11503](https://www.precursorintelligence.com/product/cisco/content_services_switch_11503) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Content Services Switch 11506](https://www.precursorintelligence.com/product/cisco/content_services_switch_11506) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Content Services Switch 11800](https://www.precursorintelligence.com/product/cisco/content_services_switch_11800) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [E-Mail Manager](https://www.precursorintelligence.com/product/cisco/e-mail_manager) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): all versions
- [Emergency Responder](https://www.precursorintelligence.com/product/cisco/emergency_responder) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): 1.1
- [Ethernet Routing Switch 1612](https://www.precursorintelligence.com/product/nortel/ethernet_routing_switch_1612) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Hardware): all versions
- [Ethernet Routing Switch 1624](https://www.precursorintelligence.com/product/nortel/ethernet_routing_switch_1624) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Hardware): all versions
- [Ethernet Routing Switch 1648](https://www.precursorintelligence.com/product/nortel/ethernet_routing_switch_1648) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Hardware): all versions
- [Gr3000](https://www.precursorintelligence.com/product/hitachi/gr3000) by [Hitachi](https://www.precursorintelligence.com/vendors/hitachi) (Hardware): all versions
- [Gr4000](https://www.precursorintelligence.com/product/hitachi/gr4000) by [Hitachi](https://www.precursorintelligence.com/vendors/hitachi) (Hardware): all versions
- [Gs4000](https://www.precursorintelligence.com/product/hitachi/gs4000) by [Hitachi](https://www.precursorintelligence.com/vendors/hitachi) (Hardware): all versions
- [Intelligent Contact Manager](https://www.precursorintelligence.com/product/cisco/intelligent_contact_manager) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): 5.0
- [Interactive Voice Response](https://www.precursorintelligence.com/product/cisco/interactive_voice_response) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): all versions
- [IP Contact Center Enterprise](https://www.precursorintelligence.com/product/cisco/ip_contact_center_enterprise) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): all versions
- [IP Contact Center Express](https://www.precursorintelligence.com/product/cisco/ip_contact_center_express) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): all versions
- [Meetingplace](https://www.precursorintelligence.com/product/cisco/meetingplace) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): all versions
- [Optical Metro 5000](https://www.precursorintelligence.com/product/nortel/optical_metro_5000) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Hardware): all versions
- [Optical Metro 5100](https://www.precursorintelligence.com/product/nortel/optical_metro_5100) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Hardware): all versions
- [Optical Metro 5200](https://www.precursorintelligence.com/product/nortel/optical_metro_5200) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Hardware): all versions
- [Remote Monitoring Suite Option](https://www.precursorintelligence.com/product/cisco/remote_monitoring_suite_option) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): all versions
- [Rt105](https://www.precursorintelligence.com/product/yamaha/rt105) by [Yamaha](https://www.precursorintelligence.com/vendors/yamaha) (Hardware): all versions
- [Rt250i](https://www.precursorintelligence.com/product/yamaha/rt250i) by [Yamaha](https://www.precursorintelligence.com/vendors/yamaha) (Hardware): all versions
- [Rt300i](https://www.precursorintelligence.com/product/yamaha/rt300i) by [Yamaha](https://www.precursorintelligence.com/vendors/yamaha) (Hardware): all versions
- [Rt57i](https://www.precursorintelligence.com/product/yamaha/rt57i) by [Yamaha](https://www.precursorintelligence.com/vendors/yamaha) (Hardware): all versions
- [Rtv700](https://www.precursorintelligence.com/product/yamaha/rtv700) by [Yamaha](https://www.precursorintelligence.com/vendors/yamaha) (Hardware): all versions
- [Rtx1000](https://www.precursorintelligence.com/product/yamaha/rtx1000) by [Yamaha](https://www.precursorintelligence.com/vendors/yamaha) (Hardware): all versions
- [Rtx1100](https://www.precursorintelligence.com/product/yamaha/rtx1100) by [Yamaha](https://www.precursorintelligence.com/vendors/yamaha) (Hardware): all versions
- [Rtx1500](https://www.precursorintelligence.com/product/yamaha/rtx1500) by [Yamaha](https://www.precursorintelligence.com/vendors/yamaha) (Hardware): all versions
- [Rtx2000](https://www.precursorintelligence.com/product/yamaha/rtx2000) by [Yamaha](https://www.precursorintelligence.com/vendors/yamaha) (Hardware): all versions
- [Sn 5420 Storage Router](https://www.precursorintelligence.com/product/cisco/sn_5420_storage_router) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Hardware): all versions
- [Succession Communication Server 1000](https://www.precursorintelligence.com/product/nortel/succession_communication_server_1000) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Hardware): all versions
- [Support Tools](https://www.precursorintelligence.com/product/cisco/support_tools) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): all versions
- [Survivable Remote Gateway](https://www.precursorintelligence.com/product/nortel/survivable_remote_gateway) by [Nortel](https://www.precursorintelligence.com/vendors/nortel) (Hardware): 1.0
- [Web Collaboration Option](https://www.precursorintelligence.com/product/cisco/web_collaboration_option) by [Cisco](https://www.precursorintelligence.com/vendors/cisco) (Application): all versions
- [Windows 2000](https://www.precursorintelligence.com/product/microsoft/windows_2000) by [Microsoft](https://www.precursorintelligence.com/vendors/microsoft) (Operating system): all versions
- [Windows Xp](https://www.precursorintelligence.com/product/microsoft/windows_xp) by [Microsoft](https://www.precursorintelligence.com/vendors/microsoft) (Operating system): all versions

## How do I fix CVE-2005-0356?

1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list.
2. **Apply the vendor’s fix.** Install the update named in the vendor’s advisory. We’ve put the advisories and patch notes first in the list.
3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood.

### References

- [secunia.com](http://secunia.com/advisories/15417/) (Patch)
- [cisco.com](http://www.cisco.com/warp/public/707/cisco-sn-20050518-tcpts.shtml) (Vendor advisory)
- [secunia.com](http://secunia.com/advisories/15393)
- [secunia.com](http://secunia.com/advisories/18222)
- [secunia.com](http://secunia.com/advisories/18662)
- [support.avaya.com](http://support.avaya.com/elmodocs2/security/ASA-2006-032.htm)
- [kb.cert.org](http://www.kb.cert.org/vuls/id/637934) (Third-party advisory, Government resource)
- [securityfocus.com](http://www.securityfocus.com/bid/13676) (Exploit)
- [exchange.xforce.ibmcloud.com](https://exchange.xforce.ibmcloud.com/vulnerabilities/20635)

## Questions

### What is CVE-2005-0356?

CVE-2005-0356 is a medium-severity flaw in Agent Desktop from Cisco, published on 31 May 2005. It can be attacked from anywhere on the internet without logging in. If it works, the attacker can slow it down.

### How serious is CVE-2005-0356?

It scores 5.0 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2005-0356 is 59 out of 100, which is Medium. Its action is "Plan remediation". Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month.

### Is CVE-2005-0356 being exploited?

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 83%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2005-0356 affect?

For Agent Desktop from Cisco: all versions. The record lists 76 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2005-0356?

Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet.

## Does CVE-2005-0356 affect you?

Precursor Intelligence keeps checking for you:

- **Tell us what you run.** Pick your software from a list, or let us work it out from your website.
- **We match it to every flaw.** Over 400,000 published flaws, checked against your list.
- **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it.
- **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools.

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