The web-based management (WBM) interface in Unify (former Siemens) OpenStage SIP and OpenScape Desk Phone IP V3 devices before R3.32.0 generates session cookies with insufficient entropy, which makes it easier for remote attackers to hijack sessions via a brute-force attack.
Conclusion & alert: CVE-2014-8422 is rated Moderate Risk (54.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.47%). Mandatory action: Review affected assets and schedule 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 | 2025-11-28 | 0.64% | 0.47% | -0.17% |
| 2 | 2025-10-27 | 0.67% | 0.64% | -0.03% |
| 3 | 2025-03-30 | — | 0.67% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 8.1 | 3.1 | HIGH |
|
2.2 | 5.9 | [email protected] |
| 6.8 | 2.0 | MEDIUM |
|
8.6 | 6.4 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| unify | openstage_sip | < r3.32.0 | cpe:2.3:a:unify:openstage_sip:*:*:*:*:*:*:*:* |
| unify | openscape_desk_phone_ip_sip | < r3.32.0 | cpe:2.3:a:unify:openscape_desk_phone_ip_sip:*:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://networks.unify.com/security/advisories/OBSO-1501-02.pdf | Mitigation Vendor Advisory |
| https://www.modzero.ch/advisories/MZ-14-02-Siemens-Unify-OpenStage.txt | Third Party Advisory |