Which products and versions are affected by CVE-2002-1643?

Affected: Helix Universal Server (Realnetworks) versions 9.0, 9.0.2.768. The full list is in the CVE brief.

Is CVE-2002-1643 being exploited in the wild?

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

Is CVE-2002-1643 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-2002-1643?

Public exploit code is available.

Is there a fix for CVE-2002-1643?

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

How urgently should CVE-2002-1643 be patched?

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

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Vulnerability Intelligence

CVE-2002-1643

HighPublic exploit

Multiple buffer overflows in RealNetworks Helix Universal Server 9.0 (9.0.2.768) allow remote attackers to execute arbitrary code via (1) a long Transport field in a SETUP RTSP request, (2) a DESCRIBE RTSP request with a long URL argument, or (3) two simultaneous HTTP GET…

Published Dec 19, 2002 · Updated Apr 15, 2026

Key Facts

Patch immediately

CVE-2002-1643 is a high-severity vulnerability (CVSS 7.5 v2) affecting Helix Universal Server (Realnetworks).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 75% 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)

75%

Higher than 99.5% 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-2002-1643 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
Helix Universal ServerRealnetworks	9.0, 9.0.2.768	n/a

Timeline

Publicly disclosed
Dec 19, 2002
Last updated
Apr 15, 2026

References

advisoryhttp://www.nextgenss.com/advisories/realhelix.txt
advisory20021220 RealNetworks HELIX Server Buffer Overflow Vulnerabilities (#NISR20122002)
patchVU#974689
patch6454
patch6456

9 more references in the full CVE brief

FAQ

Common Questions.

Multiple buffer overflows in RealNetworks Helix Universal Server 9.0 (9.0.2.768) allow remote attackers to execute arbitrary code via (1) a long Transport field in a SETUP RTSP request, (2) a DESCRIBE RTSP request with a long URL argument, or (3) two simultaneous HTTP GET requests with long arguments.
Affected: Helix Universal Server (Realnetworks) versions 9.0, 9.0.2.768. 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-2002-1643 Running On Your Attack Surface?

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