The CS1000 signaling server in Nortel Enterprise VoIP-Core-CS 1000M Chassis/Cabinet…
Priority LOW 38Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
The CS1000 signaling server in Nortel Enterprise VoIP-Core-CS 1000M Chassis/Cabinet, Enterprise VoIP-Core-CS 1000E and 1000S, Meridian-Core-Option 11C Chassis and Cabinet, and Meridian-Core-Option 51C, 61C, and 81C allows remote attackers to cause a denial of service (telephony application outage) via a flood of packets to Embedded LAN (ELAN) ports.
Why it matters now
EPSS 0.02292 83rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nortel:communications_server:1000e:*:*:*:*:*:*:* | 1000e | Running on | Nortel |
| cpe:2.3:a:nortel:communications_server:1000m:*:*:*:*:*:*:* | 1000m | Running on | Nortel |
| cpe:2.3:a:nortel:communications_server:1000s:*:*:*:*:*:*:* | 1000s | Running on | Nortel |
| cpe:2.3:a:nortel:meridian_option_11c:*:*:*:*:*:*:*:* | all versions | Vulnerable | Nortel |
| cpe:2.3:a:nortel:meridian_option_51c:*:*:*:*:*:*:*:* | all versions | Vulnerable | Nortel |
| cpe:2.3:a:nortel:meridian_option_61c:*:*:*:*:*:*:*:* | all versions | Vulnerable | Nortel |
| cpe:2.3:a:nortel:meridian_option_81c:*:*:*:*:*:*:*:* | all versions | Vulnerable | Nortel |
| cpe:2.3:a:nortel:voip-core-cs:1000e:*:enterprise:*:*:*:*:* | 1000e | Vulnerable | Nortel |
| cpe:2.3:a:nortel:voip-core-cs:1000m:*:enterprise:*:*:*:*:* | 1000m | Vulnerable | Nortel |
| cpe:2.3:a:nortel:voip-core-cs:1000s:*:enterprise:*:*:*:*:* | 1000s | Vulnerable | Nortel |
- cpe:2.3:a:nortel:communications_server:1000e:*:*:*:*:*:*:* Versions 1000e Running on ·Nortel
- cpe:2.3:a:nortel:communications_server:1000m:*:*:*:*:*:*:* Versions 1000m Running on ·Nortel
- cpe:2.3:a:nortel:communications_server:1000s:*:*:*:*:*:*:* Versions 1000s Running on ·Nortel
- cpe:2.3:a:nortel:meridian_option_11c:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Nortel
- cpe:2.3:a:nortel:meridian_option_51c:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Nortel
- cpe:2.3:a:nortel:meridian_option_61c:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Nortel
- cpe:2.3:a:nortel:meridian_option_81c:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Nortel
- cpe:2.3:a:nortel:voip-core-cs:1000e:*:enterprise:*:*:*:*:* Versions 1000e Vulnerable ·Nortel
- cpe:2.3:a:nortel:voip-core-cs:1000m:*:enterprise:*:*:*:*:* Versions 1000m Vulnerable ·Nortel
- cpe:2.3:a:nortel:voip-core-cs:1000s:*:enterprise:*:*:*:*:* Versions 1000s Vulnerable ·Nortel
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2007-5591
- 2026-10-03 Alias added: GHSA-pwh2-rcv8-v6g8
References
More Nortel Meridian Option 11c vulnerabilities
- TI-2007-05421 The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from… CVSS 2.0HIGH 7.1
- TI-2007-05418 The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from… CVSS 2.0MEDIUM 4.3
- TI-2007-05419 The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from… CVSS 2.0MEDIUM 4.3
Sources
- CVE-2007-5591 · CVE Program
- CVE-2007-5591 · NVD
- FIRST EPSS
- GHSA-pwh2-rcv8-v6g8 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences