Multiple integer overflows in libssh before 0.5.3 allow remote attackers to cause a denial of service (infinite loop or crash) and possibly execute arbitrary code via unspecified vectors, which triggers a buffer overflow, infinite loop, or possibly some other unspecified vulnerabilities.
Conclusion & alert: CVE-2012-4562 is rated High Risk (68.5/100): CVSS High severity, with high exploitation likelihood (EPSS 12.85%, 96th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +6.12% 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 | 6.73% | 12.85% | +6.12% |
| 2 | 2025-03-30 | 8.23% | 6.73% | -1.50% |
| 3 | 2025-03-29 | — | 8.23% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2012-4562 not yet assigned priority: Debian including 1 source packages (libssh), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2012-4562 |
gentoo
|
normal | CVE-2012-4562: 1 GLSA(s) (201402-26), 1 atom(s) (net-libs/libssh); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2012-4562 |
ubuntu
|
medium | CVE-2012-4562 medium priority: Ubuntu including 1 source packages (libssh), 6 status rows across 6 suites (hardy, lucid, oneiric, precise, quantal, upstream): released 5, ignored 1. | https://ubuntu.com/security/CVE-2012-4562 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| libssh | libssh | <= 0.5.2 | cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:* |
| libssh | libssh | 0.4.7 | cpe:2.3:a:libssh:libssh:0.4.7:*:*:*:*:*:*:* |
| libssh | libssh | 0.4.8 | cpe:2.3:a:libssh:libssh:0.4.8:*:*:*:*:*:*:* |
| libssh | libssh | 0.5.0 | cpe:2.3:a:libssh:libssh:0.5.0:*:*:*:*:*:*:* |
| libssh | libssh | 0.5.0 | cpe:2.3:a:libssh:libssh:0.5.0:rc1:*:*:*:*:*:* |
| libssh | libssh | 0.5.1 | cpe:2.3:a:libssh:libssh:0.5.1:*:*:*:*:*:*:* |