The s_mp_div function in lib/freebl/mpi/mpi.c in Mozilla Network Security Services (NSS) before 3.21, as used in Mozilla Firefox before 44.0, improperly divides numbers, which might make it easier for remote attackers to defeat cryptographic protection mechanisms by leveraging use of the (1) mp_div or (2) mp_exptmod function.
結論預警: CVE-2016-1938 綜合評估為中等風險（58.2/100）：CVSS 技術影響為中級，利用機率（EPSS 3.12%） 核心證據: 近一日 EPSS 上升 +2.07%，被利用關注度持續升高。 強制指令: 梳理受影響資產並納入修補計畫。
風險隨態勢動態變化；本站持續評估並同步更新本頁展示內容。
EPSS 日更估計相對被利用可能性；百分位表示該 CVE 在已評分漏洞中的相對排名（越高表示相對更嚴重）。
| # | 日期 | 舊 EPSS 分數 | 新 EPSS 分數 | 變化（新 − 舊） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 1.05% | 3.12% | +2.07% |
| 2 | 2026-03-02 | 0.59% | 1.05% | +0.46% |
| 3 | 2026-01-06 | — | 0.59% | — |
完整 EPSS 歷史 （共 12 筆）
該 CVE 的 CVSS 指標。
| 底座分 | 版本 | 嚴重度 | 向量 | 可利用性 | 影響 | 分數來源 |
|---|---|---|---|---|---|---|
| 6.5 | 3.0 | MEDIUM |
|
3.9 | 2.5 | [email protected] |
| 6.4 | 2.0 | MEDIUM |
|
10.0 | 4.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2016-1938 not yet assigned priority: Debian including 1 source packages (nss), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2016-1938 |
gentoo
|
normal | CVE-2016-1938: 2 GLSA(s) (201605-06, 201701-46), 6 atom(s) (dev-libs/nspr, dev-libs/nss, mail-client/thunderbird, mail-client/thunderbird-bin, www-client/firefox, www-client/firefox-bin); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-1938 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2016-1938 |
suse
|
medium | CVE-2016-1938 severity moderate: SUSE including 158 source package names (MozillaFirefox-102.11.0-150200.152.87.1, MozillaFirefox-115.10.0-150200.152.134.1, …), 448 product×package rows across 67 product lines (Image SLES12-SP5-Azure-BYOS, Image SLES12-SP5-Azure-Basic-On-Demand, … (67 product lines)): Fixed 448. | https://www.suse.com/security/cve/CVE-2016-1938/ |
ubuntu
|
medium | CVE-2016-1938 medium priority: Ubuntu including 3 source packages (firefox, nss, thunderbird), 24 status rows across 8 suites (precise, trusty, upstream, vivid, wily, xenial, yakkety, zesty): released 19, not-affected 3, ignored 2. | https://ubuntu.com/security/CVE-2016-1938 |
| 廠商 | 產品 | 版本 | 原始 CPE |
|---|---|---|---|
| opensuse | leap | 42.1 | cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:* |
| opensuse | opensuse | 13.1 | cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:* |
| opensuse | opensuse | 13.2 | cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* |
| mozilla | nss | <= 3.20.1 | cpe:2.3:a:mozilla:nss:*:*:*:*:*:*:*:* |
| mozilla | firefox | <= 43.0.4 | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |