Heap-based buffer overflow in Cisco Unified IP Phone 7940, 7940G, 7960, and 7960G running SIP firmware might allow remote SIP servers to execute arbitrary code via a crafted challenge/response message.
Conclusion & alert: CVE-2008-0531 is rated High Risk (68.3/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 2.89%). Core evidence: EPSS rose +1.36% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 1.53% | 2.89% | +1.36% |
| 2 | 2025-03-30 | 2.64% | 1.53% | -1.11% |
| 3 | 2025-03-29 | — | 2.64% | — |
Full EPSS history (7 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.3 | 2.0 | HIGH |
|
8.6 | 10.0 | [email protected] |
: Patch requires login
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| cisco | skinny_client_control_protocol_\(sccp\)_firmware | — | cpe:2.3:a:cisco:skinny_client_control_protocol_\(sccp\)_firmware:*:*:*:*:*:*:*:* |
| cisco | session_initiation_protocol_\(sip\)_firmware | — | cpe:2.3:a:cisco:session_initiation_protocol_\(sip\)_firmware:*:*:*:*:*:*:*:* |