Multiple buffer overflows in smbvalid/smbval SMB authentication library, as used in Apache::AuthenSmb and possibly other modules, allows remote attackers to execute arbitrary commands via (1) a long username, (2) a long password, and (3) other unspecified methods.
Conclusion & alert: CVE-1999-1237 is rated High Risk (73.7/100): CVSS Critical severity, with high exploitation likelihood (EPSS 8.15%, 94th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. 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 | 7.40% | 8.15% | +0.76% |
| 2 | 2026-05-10 | 9.49% | 7.40% | -2.10% |
| 3 | 2026-04-30 | — | 9.49% | — |
Full EPSS history (13 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| apache | http_server | — | cpe:2.3:a:apache:http_server:-:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://www.securityfocus.com/archive/1/14384 | Third Party Advisory VDB Entry |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/2272 | Third Party Advisory VDB Entry |