CVE-2019-16910

Arm Mbed TLS before 2.19.0 and Arm Mbed Crypto before 2.0.0, when deterministic ECDSA is enabled, use an RNG with insufficient entropy for blinding, which might allow an attacker to recover a private key via side-channel attacks if a victim signs the same message many times. (For Mbed TLS, the fix is also available in versions 2.7.12 and 2.16.3.)

Published: 2019-09-26 Last update: 2026-06-05 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-16910 is rated Moderate Risk (46/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.67%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-16910

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 2026-05-26 0.92% 0.67% -0.25%
2 2026-01-03 0.96% 0.92% -0.03%
3 2025-12-28 — 0.96% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-16910

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.6 3.6 [email protected]
2.6 2.0 LOW
AV:N/AC:H/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 4.9 2.9 [email protected]

Weakness enumeration for CVE-2019-16910

GitHub Security Advisory for CVE-2019-16910

GHSA-jg4p-c829-4q39 · Severity: medium — Arm Mbed TLS before 2.19.0 and Arm Mbed Crypto before 2.0.0, when deterministic ECDSA is enabled,...

OS Trackers for CVE-2019-16910

vendor priority summary link
alpine medium CVE-2019-16910: 2 source package rows (mbedtls, mbedtls2); 14 state rows across 14 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-community, 3.20-main, 3.21-community, 3.21-main, 3.22-community, 3.22-main, edge-community, edge-main); fixed 14, open 0. https://security.alpinelinux.org/vuln/CVE-2019-16910
debian not yet assigned CVE-2019-16910 not yet assigned priority: Debian including 1 source packages (mbedtls), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-16910
ubuntu low CVE-2019-16910 low priority: Ubuntu including 1 source packages (mbedtls), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 12, needs-triage 2, DNE 1, released 1. https://ubuntu.com/security/CVE-2019-16910

Affected software / configurations for CVE-2019-16910

Vendor Product Version Raw CPE
arm mbed_crypto < 2.0.0 cpe:2.3:a:arm:mbed_crypto:*:*:*:*:*:*:*:*
arm mbed_tls < 2.7.12 cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
arm mbed_tls >= 2.8.0, < 2.16.3 cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
trustedfirmware mbed_tls >= 2.17.0, < 2.19.0 cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:*
fedoraproject fedora 29 cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
fedoraproject fedora 30 cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
fedoraproject fedora 31 cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

References for CVE-2019-16910

URL Tags
https://github.com/ARMmbed/mbedtls/commit/298a43a77ec0ed2c19a8c924ddd8571ef3e65dfd Patch
https://github.com/ARMmbed/mbedtls/commit/33f66ba6fd234114aa37f0209dac031bb2870a9b Patch
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CGSKQSGR5SOBRBXDSSPTCDSBB5K3GMPF/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CSFFOROD6IVLADZHNJC2LPDV7FQRP7XB/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PEHHH2DOBXB25CAU3Q6E66X723VAYTB5/ Mailing List Third Party Advisory
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2019-10 Vendor Advisory
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