client_side.cc in Squid before 3.5.18 and 4.x before 4.0.10 does not properly ignore the Host header when absolute-URI is provided, which allows remote attackers to conduct cache-poisoning attacks via an HTTP request.
结论预警: CVE-2016-4553 综合评估为高风险（69.6/100）：CVSS 技术影响为高级，利用概率偏高（EPSS 79.97%，百分位 100%） 核心证据: EPSS 显示该漏洞近期被利用的可能性处于高位。 强制指令: 被利用概率偏高—请排查暴露面并优先安排修补。
风险随态势动态变化；本站持续评估并同步更新本页展示内容。
EPSS 日更估计相对被利用可能性；百分位表示该 CVE 在已评分漏洞中的相对排名（越高表示相对更严重）。
| # | 日期 | 旧 EPSS 分数 | 新 EPSS 分数 | 变化（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-07-01 | 79.65% | 79.97% | +0.32% |
| 2 | 2026-06-15 | 82.84% | 79.65% | -3.19% |
| 3 | 2025-12-28 | — | 82.84% | — |
完整 EPSS 历史 （共 23 条）
该 CVE 的 CVSS 指标。
| 底座分 | 版本 | 严重度 | 向量 | 可利用性 | 影响 | 分数来源 |
|---|---|---|---|---|---|---|
| 8.6 | 3.0 | HIGH |
|
3.9 | 4.0 | [email protected] |
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2016-4553 unimportant priority: Debian including 1 source packages (squid), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2016-4553 |
gentoo
|
normal | CVE-2016-4553: 1 GLSA(s) (201607-01), 1 atom(s) (net-proxy/squid); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-4553 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2016-4553 |
suse
|
medium | CVE-2016-4553 severity moderate: SUSE including 246 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 274 product×package rows across 40 product lines (HPE Helion OpenStack 8, SUSE Liberty Linux 7, … (40 product lines)): Known Affected 231, Known Not Affected 22, Fixed 21. | https://www.suse.com/security/cve/CVE-2016-4553/ |
ubuntu
|
medium | CVE-2016-4553 medium priority: Ubuntu including 1 source packages (squid3), 5 status rows across 5 suites (precise, trusty, upstream, wily, xenial): released 4, not-affected 1. | https://ubuntu.com/security/CVE-2016-4553 |
| 厂商 | 产品 | 版本 | 原始 CPE |
|---|---|---|---|
| canonical | ubuntu_linux | 12.04 | cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 14.04 | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 15.10 | cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 16.04 | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* |
| squid-cache | squid | <= 3.5.17 | cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* |
| squid-cache | squid | 4.0.1 | cpe:2.3:a:squid-cache:squid:4.0.1:*:*:*:*:*:*:* |
| squid-cache | squid | 4.0.2 | cpe:2.3:a:squid-cache:squid:4.0.2:*:*:*:*:*:*:* |
| squid-cache | squid | 4.0.3 | cpe:2.3:a:squid-cache:squid:4.0.3:*:*:*:*:*:*:* |
| squid-cache | squid | 4.0.4 | cpe:2.3:a:squid-cache:squid:4.0.4:*:*:*:*:*:*:* |
| squid-cache | squid | 4.0.5 | cpe:2.3:a:squid-cache:squid:4.0.5:*:*:*:*:*:*:* |
| squid-cache | squid | 4.0.6 | cpe:2.3:a:squid-cache:squid:4.0.6:*:*:*:*:*:*:* |
| squid-cache | squid | 4.0.7 | cpe:2.3:a:squid-cache:squid:4.0.7:*:*:*:*:*:*:* |
| squid-cache | squid | 4.0.8 | cpe:2.3:a:squid-cache:squid:4.0.8:*:*:*:*:*:*:* |
| squid-cache | squid | 4.0.9 | cpe:2.3:a:squid-cache:squid:4.0.9:*:*:*:*:*:*:* |
| oracle | linux | 7 | cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:* |