SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2002-0209

Nortel Alteon ACEdirector WebOS 9.0, with the Server Load Balancing (SLB) and Cookie-Based Persistence features enabled, allows remote attackers to determine the real IP address of a web server with a half-closed session, which causes ACEdirector to…

EXPLOIT ✓MEDIUM 5.0EPSS 3.32%

Does this matter?

A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 3.3%. Treat it as high on anything reachable from the internet.

Description

Nortel Alteon ACEdirector WebOS 9.0, with the Server Load Balancing (SLB) and Cookie-Based Persistence features enabled, allows remote attackers to determine the real IP address of a web server with a half-closed session, which causes ACEdirector to send packets from the server without changing the address to the virtual IP address.

CVSS 2.0
5.0 MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N
EPSS
3.32% probability · 89th percentile
Public exploits
1 in Exploit-DB · verified · first 20 December 2001
CISA KEV
Not listed
Affected
nortel/alteon acedirector
Source
cve@mitre.org
EPSS trend
0%3%5%26 October 2026: 3.32%26 October 202626 October 2026

EPSS 3.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-21243source ↗Alteon AceDirector - Half-Closed HTTP Request IP Address Revealinghardware · Dave Plonkaremote20 December 2001yes

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.