Which products and versions are affected by CVE-2005-0560?

Affected: Exchange Server (Microsoft) versions 2000, 2003. The full list is in the CVE brief.

Is CVE-2005-0560 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2005-0560 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2005-0560?

Public exploit code is available.

Is there a fix for CVE-2005-0560?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2005-0560 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Request A Demo

Vulnerability Intelligence

CVE-2005-0560

HighPublic exploit

Heap-based buffer overflow in the SvrAppendReceivedChunk function in xlsasink.dll in the SMTP service of Exchange Server 2000 and 2003 allows remote attackers to execute arbitrary code via a crafted X-LINK2STATE extended verb request to the SMTP port.

Published May 2, 2005 · Updated Apr 15, 2026

Key Facts

Patch immediately

CVE-2005-0560 is a high-severity vulnerability (CVSS 7.5 v2) affecting Exchange Server (Microsoft).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 69% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v2

7.5

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

EPSS (30-day exploit likelihood)

69%

Higher than 99.3% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2005-0560 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
Exchange ServerMicrosoft	2000, 2003	n/a

Timeline

Publicly disclosed
May 2, 2005
Last updated
Apr 15, 2026

Weakness Type

CWE-787 Out-of-bounds Write

References

advisory20050419 MS05-021 Microsoft Exchange X-LINK2STATE Heap Overflow PoC
advisoryoval:org.mitre.oval:def:4032
patchMS05-021
patch14920
patchVU#275193

4 more references in the full CVE brief

FAQ

Common Questions.

Heap-based buffer overflow in the SvrAppendReceivedChunk function in xlsasink.dll in the SMTP service of Exchange Server 2000 and 2003 allows remote attackers to execute arbitrary code via a crafted X-LINK2STATE extended verb request to the SMTP port.
Affected: Exchange Server (Microsoft) versions 2000, 2003. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-2005-0560 Running On Your Attack Surface?

Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.