Which products and versions are affected by CVE-2009-0546?

Affected: Feeddemon (Newsgator) versions 2.0.0.24, 2.6, 2.6.1.4, 2.6.1.5. The full list is in the CVE brief.

Is CVE-2009-0546 being exploited in the wild?

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

Is CVE-2009-0546 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-2009-0546?

Public exploit code is available.

Is there a fix for CVE-2009-0546?

Fixed versions are available, including Feeddemon 2.7.

How urgently should CVE-2009-0546 be patched?

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

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Emerging threatsCritical

CVE-2009-0546Feeddemon Memory Corruption

Stack-based buffer overflow in NewsGator FeedDemon 2.7 and earlier allows user-assisted remote attackers to execute arbitrary code via a long text attribute in an outline element in a .opml file.

Published Feb 12, 2009 · Updated Apr 22, 2026

Key Facts

Patch immediately

CVE-2009-0546 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Feeddemon (Newsgator).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 37% probability of exploitation in the next 30 days.
Fixed versions are available, including Feeddemon 2.7.
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)

37%

Higher than 98.4% of all scored CVEs

Exploit maturity

Weaponized

ATLAS score

58/100

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

advisory33718

Description

Stack-based buffer overflow in NewsGator FeedDemon 2.7 and earlier allows user-assisted remote attackers to execute arbitrary code via a long text attribute in an outline element in a .opml file.

Affected Products

5 affected entries in total

Product	Affected versions	Fixed in
FeeddemonNewsgator	2.0.0.24, 2.6, 2.6.1.4, 2.6.1.5	2.7

Patched Releases

Feeddemon

2.7

Timeline

Publicly disclosed
Feb 12, 2009
Last updated
Apr 22, 2026

Weakness Type

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

5 more references in the full CVE brief

FAQ

Common Questions.

Stack-based buffer overflow in NewsGator FeedDemon 2.7 and earlier allows user-assisted remote attackers to execute arbitrary code via a long text attribute in an outline element in a .opml file.
Affected: Feeddemon (Newsgator) versions 2.0.0.24, 2.6, 2.6.1.4, 2.6.1.5. 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 Feeddemon 2.7.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Is CVE-2009-0546 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.