CVE-2008-6564
HIGH · CVSS 7.6EPSS 2.2%EU EUVD
Nortel UNIStim protocol, as used in Communication Server 1000 and other products, uses predictable sequence numbers, which allows remote attackers to hijack sessions via sniffing or brute force attacks.
Key facts
- CVSS score
- 7.6 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:H/Au:N/C:C/I:C/A:C- EPSS score
- 2.2% (83th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2008-6527)
- Published
- March 31, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2008-6527 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- nortel / communication server 1000
- nortel / unistim protocol
References
- http://osvdb.org/44379
- http://secunia.com/advisories/29747
- http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=713455(Vendor Advisory)
- http://www.securityfocus.com/bid/28691
- http://www.securitytracker.com/id?1019847
- http://www.voipshield.com/research-details.php?id=27&s=4&threats_details=&threats_category=0&threats_vendor=0&limit=20&sort=discovered&sortby=DESC
- https://exchange.xforce.ibmcloud.com/vulnerabilities/41801
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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