Which products and versions are affected by CVE-2010-4566?

Affected: Access Gateway (Citrix) versions 4.5.5, 4.5.6, 4.5.7, 4.5, 4.5-hf1, 4.6.1, 4.6.2, 4.6.3. The full list is in the CVE brief.

Is CVE-2010-4566 being exploited in the wild?

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

Is CVE-2010-4566 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-2010-4566?

Public exploit code is available.

Is there a fix for CVE-2010-4566?

Fixed versions are available, including Access Gateway 9.2-49.8.

How urgently should CVE-2010-4566 be patched?

Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

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Emerging threatsCritical

CVE-2010-4566Access Gateway Vulnerability

The web authentication form in the NT4 authentication component in Citrix Access Gateway Enterprise Edition 9.2-49.8 and earlier, and the NTLM authentication component in Access Gateway Standard and Advanced Editions before Access Gateway 5.0, allows attackers to execute…

Published Jan 14, 2011 · Updated Apr 28, 2026

Key Facts

Patch immediately

CVE-2010-4566 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Access Gateway (Citrix).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 28% probability of exploitation in the next 30 days.
Fixed versions are available, including Access Gateway 9.2-49.8.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Scores

CVSS v2

9.3

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

EPSS (30-day exploit likelihood)

28%

Higher than 98.0% of all scored CVEs

Exploit maturity

Weaponized

ATLAS score

70/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Weaponized

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

advisoryhttp://support.citrix.com/article/CTX127613

Description

Affected Products

18 affected entries in total

Product	Affected versions	Fixed in
Access GatewayCitrix	4.5.5, 4.5.6, 4.5.7, 4.5, 4.5-hf1, 4.6.1, 4.6.2, 4.6.3	9.2-49.8

Patched Releases

Access Gateway

9.2-49.8

Timeline

Publicly disclosed
Jan 14, 2011
Last updated
Apr 28, 2026

References

advisorysupport.citrix.com · CTX127613
exploitMSF citrix_access_gateway_exec.rb
exploitExploitDB-15806
exploitExploitDB-16916
other8119

4 more references in the full CVE brief

FAQ

Common Questions.

The web authentication form in the NT4 authentication component in Citrix Access Gateway Enterprise Edition 9.2-49.8 and earlier, and the NTLM authentication component in Access Gateway Standard and Advanced Editions before Access Gateway 5.0, allows attackers to execute arbitrary commands via shell metacharacters in…
Affected: Access Gateway (Citrix) versions 4.5.5, 4.5.6, 4.5.7, 4.5, 4.5-hf1, 4.6.1, 4.6.2, 4.6.3. 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.
Fixed versions are available, including Access Gateway 9.2-49.8.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Is CVE-2010-4566 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.