OpenSSL 0.9.6 before 0.9.6d does not properly handle unknown message types, which allows remote attackers to cause a denial of service (infinite loop), as demonstrated using the Codenomicon TLS Test Tool.
Conclusion & alert: CVE-2004-0081 is rated Moderate Risk (49.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.39%). 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 | 2025-12-28 | 2.94% | 2.39% | -0.55% |
| 2 | 2025-12-27 | 2.39% | 2.94% | +0.55% |
| 3 | 2025-11-21 | — | 2.39% | — |
Full EPSS history (15 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2004-0081 not yet assigned priority: Debian including 1 source packages (openssl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2004-0081 |
gentoo
|
normal | CVE-2004-0081: 1 GLSA(s) (200403-03), 1 atom(s) (dev-libs/openssl); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2004-0081 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2004-0081 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| cisco | firewall_services_module | — | cpe:2.3:h:cisco:firewall_services_module:*:*:*:*:*:*:*:* |
| cisco | firewall_services_module | 1.1.2 | cpe:2.3:h:cisco:firewall_services_module:1.1.2:*:*:*:*:*:*:* |
| cisco | firewall_services_module | 1.1.3 | cpe:2.3:h:cisco:firewall_services_module:1.1.3:*:*:*:*:*:*:* |
| cisco | firewall_services_module | 1.1_\(3.005\) | cpe:2.3:h:cisco:firewall_services_module:1.1_\(3.005\):*:*:*:*:*:*:* |
| cisco | firewall_services_module | 2.1_\(0.208\) | cpe:2.3:h:cisco:firewall_services_module:2.1_\(0.208\):*:*:*:*:*:*:* |
| hp | aaa_server | — | cpe:2.3:h:hp:aaa_server:*:*:*:*:*:*:*:* |
| hp | apache-based_web_server | 2.0.43.00 | cpe:2.3:h:hp:apache-based_web_server:2.0.43.00:*:*:*:*:*:*:* |
| hp | apache-based_web_server | 2.0.43.04 | cpe:2.3:h:hp:apache-based_web_server:2.0.43.04:*:*:*:*:*:*:* |
| symantec | clientless_vpn_gateway_4400 | 5.0 | cpe:2.3:h:symantec:clientless_vpn_gateway_4400:5.0:*:*:*:*:*:*:* |
| cisco | ciscoworks_common_management_foundation | 2.1 | cpe:2.3:a:cisco:ciscoworks_common_management_foundation:2.1:*:*:*:*:*:*:* |
| cisco | ciscoworks_common_services | 2.2 | cpe:2.3:a:cisco:ciscoworks_common_services:2.2:*:*:*:*:*:*:* |
| avaya | converged_communications_server | 2.0 | cpe:2.3:h:avaya:converged_communications_server:2.0:*:*:*:*:*:*:* |
| avaya | sg200 | 4.4 | cpe:2.3:h:avaya:sg200:4.4:*:*:*:*:*:*:* |
| avaya | sg200 | 4.31.29 | cpe:2.3:h:avaya:sg200:4.31.29:*:*:*:*:*:*:* |
| avaya | sg203 | 4.4 | cpe:2.3:h:avaya:sg203:4.4:*:*:*:*:*:*:* |
| avaya | sg203 | 4.31.29 | cpe:2.3:h:avaya:sg203:4.31.29:*:*:*:*:*:*:* |
| avaya | sg208 | — | cpe:2.3:h:avaya:sg208:*:*:*:*:*:*:*:* |
| avaya | sg208 | 4.4 | cpe:2.3:h:avaya:sg208:4.4:*:*:*:*:*:*:* |
| avaya | sg5 | 4.2 | cpe:2.3:h:avaya:sg5:4.2:*:*:*:*:*:*:* |
| avaya | sg5 | 4.3 | cpe:2.3:h:avaya:sg5:4.3:*:*:*:*:*:*:* |
| avaya | sg5 | 4.4 | cpe:2.3:h:avaya:sg5:4.4:*:*:*:*:*:*:* |
| apple | mac_os_x | 10.3.3 | cpe:2.3:o:apple:mac_os_x:10.3.3:*:*:*:*:*:*:* |
| apple | mac_os_x_server | 10.3.3 | cpe:2.3:o:apple:mac_os_x_server:10.3.3:*:*:*:*:*:*:* |
| freebsd | freebsd | 4.8 | cpe:2.3:o:freebsd:freebsd:4.8:*:*:*:*:*:*:* |
| freebsd | freebsd | 4.8 | cpe:2.3:o:freebsd:freebsd:4.8:releng:*:*:*:*:*:* |
| freebsd | freebsd | 4.9 | cpe:2.3:o:freebsd:freebsd:4.9:*:*:*:*:*:*:* |
| freebsd | freebsd | 5.1 | cpe:2.3:o:freebsd:freebsd:5.1:*:*:*:*:*:*:* |
| freebsd | freebsd | 5.1 | cpe:2.3:o:freebsd:freebsd:5.1:release:*:*:*:*:*:* |
| freebsd | freebsd | 5.1 | cpe:2.3:o:freebsd:freebsd:5.1:releng:*:*:*:*:*:* |
| freebsd | freebsd | 5.2 | cpe:2.3:o:freebsd:freebsd:5.2:*:*:*:*:*:*:* |
| freebsd | freebsd | 5.2.1 | cpe:2.3:o:freebsd:freebsd:5.2.1:release:*:*:*:*:*:* |
| hp | hp-ux | 8.05 | cpe:2.3:o:hp:hp-ux:8.05:*:*:*:*:*:*:* |
| hp | hp-ux | 11.00 | cpe:2.3:o:hp:hp-ux:11.00:*:*:*:*:*:*:* |
| hp | hp-ux | 11.11 | cpe:2.3:o:hp:hp-ux:11.11:*:*:*:*:*:*:* |
| hp | hp-ux | 11.23 | cpe:2.3:o:hp:hp-ux:11.23:*:*:*:*:*:*:* |
| openbsd | openbsd | 3.3 | cpe:2.3:o:openbsd:openbsd:3.3:*:*:*:*:*:*:* |
| openbsd | openbsd | 3.4 | cpe:2.3:o:openbsd:openbsd:3.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 3.0 | cpe:2.3:o:redhat:enterprise_linux:3.0:*:advanced_server:*:*:*:*:* |
| redhat | enterprise_linux | 3.0 | cpe:2.3:o:redhat:enterprise_linux:3.0:*:enterprise_server:*:*:*:*:* |
| redhat | enterprise_linux | 3.0 | cpe:2.3:o:redhat:enterprise_linux:3.0:*:workstation_server:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 3.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:3.0:*:*:*:*:*:*:* |
| redhat | linux | 7.2 | cpe:2.3:o:redhat:linux:7.2:*:*:*:*:*:*:* |
| redhat | linux | 7.3 | cpe:2.3:o:redhat:linux:7.3:*:*:*:*:*:*:* |
| redhat | linux | 8.0 | cpe:2.3:o:redhat:linux:8.0:*:*:*:*:*:*:* |
| sco | openserver | 5.0.6 | cpe:2.3:o:sco:openserver:5.0.6:*:*:*:*:*:*:* |
| sco | openserver | 5.0.7 | cpe:2.3:o:sco:openserver:5.0.7:*:*:*:*:*:*:* |
| cisco | ios | 12.1\(11\)e | cpe:2.3:o:cisco:ios:12.1\(11\)e:*:*:*:*:*:*:* |
| cisco | ios | 12.1\(11b\)e | cpe:2.3:o:cisco:ios:12.1\(11b\)e:*:*:*:*:*:*:* |
| cisco | ios | 12.1\(11b\)e12 | cpe:2.3:o:cisco:ios:12.1\(11b\)e12:*:*:*:*:*:*:* |
| cisco | ios | 12.1\(11b\)e14 | cpe:2.3:o:cisco:ios:12.1\(11b\)e14:*:*:*:*:*:*:* |
| cisco | ios | 12.1\(13\)e9 | cpe:2.3:o:cisco:ios:12.1\(13\)e9:*:*:*:*:*:*:* |
| cisco | ios | 12.1\(19\)e1 | cpe:2.3:o:cisco:ios:12.1\(19\)e1:*:*:*:*:*:*:* |
| cisco | ios | 12.2\(14\)sy | cpe:2.3:o:cisco:ios:12.2\(14\)sy:*:*:*:*:*:*:* |
| cisco | ios | 12.2\(14\)sy1 | cpe:2.3:o:cisco:ios:12.2\(14\)sy1:*:*:*:*:*:*:* |
| cisco | ios | 12.2sy | cpe:2.3:o:cisco:ios:12.2sy:*:*:*:*:*:*:* |
| cisco | ios | 12.2za | cpe:2.3:o:cisco:ios:12.2za:*:*:*:*:*:*:* |
| 4d | webstar | 4.0 | cpe:2.3:a:4d:webstar:4.0:*:*:*:*:*:*:* |
| 4d | webstar | 5.2 | cpe:2.3:a:4d:webstar:5.2:*:*:*:*:*:*:* |
| 4d | webstar | 5.2.1 | cpe:2.3:a:4d:webstar:5.2.1:*:*:*:*:*:*:* |
| 4d | webstar | 5.2.2 | cpe:2.3:a:4d:webstar:5.2.2:*:*:*:*:*:*:* |
| 4d | webstar | 5.2.3 | cpe:2.3:a:4d:webstar:5.2.3:*:*:*:*:*:*:* |
| 4d | webstar | 5.2.4 | cpe:2.3:a:4d:webstar:5.2.4:*:*:*:*:*:*:* |
| 4d | webstar | 5.3 | cpe:2.3:a:4d:webstar:5.3:*:*:*:*:*:*:* |
| 4d | webstar | 5.3.1 | cpe:2.3:a:4d:webstar:5.3.1:*:*:*:*:*:*:* |
| avaya | intuity_audix | — | cpe:2.3:a:avaya:intuity_audix:*:*:lx:*:*:*:*:* |
| avaya | intuity_audix | 5.1.46 | cpe:2.3:a:avaya:intuity_audix:5.1.46:*:*:*:*:*:*:* |
| avaya | intuity_audix | s3210 | cpe:2.3:a:avaya:intuity_audix:s3210:*:*:*:*:*:*:* |
| avaya | intuity_audix | s3400 | cpe:2.3:a:avaya:intuity_audix:s3400:*:*:*:*:*:*:* |
| avaya | vsu | 5 | cpe:2.3:a:avaya:vsu:5:*:*:*:*:*:*:* |
| avaya | vsu | 5x | cpe:2.3:a:avaya:vsu:5x:*:*:*:*:*:*:* |
| avaya | vsu | 100_r2.0.1 | cpe:2.3:a:avaya:vsu:100_r2.0.1:*:*:*:*:*:*:* |
| avaya | vsu | 500 | cpe:2.3:a:avaya:vsu:500:*:*:*:*:*:*:* |
| avaya | vsu | 2000_r2.0.1 | cpe:2.3:a:avaya:vsu:2000_r2.0.1:*:*:*:*:*:*:* |
| avaya | vsu | 5000_r2.0.1 | cpe:2.3:a:avaya:vsu:5000_r2.0.1:*:*:*:*:*:*:* |
| avaya | vsu | 7500_r2.0.1 | cpe:2.3:a:avaya:vsu:7500_r2.0.1:*:*:*:*:*:*:* |
| avaya | vsu | 10000_r2.0.1 | cpe:2.3:a:avaya:vsu:10000_r2.0.1:*:*:*:*:*:*:* |
| checkpoint | firewall-1 | — | cpe:2.3:a:checkpoint:firewall-1:*:*:vsx-ng-ai:*:*:*:*:* |
| checkpoint | firewall-1 | 2.0 | cpe:2.3:a:checkpoint:firewall-1:2.0:*:gx:*:*:*:*:* |
| checkpoint | firewall-1 | next_generation_fp0 | cpe:2.3:a:checkpoint:firewall-1:next_generation_fp0:*:*:*:*:*:*:* |
| checkpoint | firewall-1 | next_generation_fp1 | cpe:2.3:a:checkpoint:firewall-1:next_generation_fp1:*:*:*:*:*:*:* |