What is the CVSS score of CVE-2026-3503?

CVE-2026-3503 has a CVSS 4.0 base score of 4.3 (Medium). CVSS vector: CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N/U:Amber. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-3503?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Wolfssl Wolfcrypt CVE-2026-3503

Q: Which versions of Wolfssl Wolfcrypt are affected by CVE-2026-3503?

CVE-2026-3503 presents moderate security risk rated CVSS 4.3. Exploitation could compromise the security of affected deployments.. A patch is available.

EUVD-2026-13149 MEDIUM

Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG) (CWE-335)

2026-03-19 wolfSSL

Information Disclosure Wolfssl Wolfcrypt Wolfssl Inc

4.3

CVSS 4.0 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-335 OWASP Top 10:2025 A04:2025 - Cryptographic Failures ASVS 5.0 V11 - Cryptography Proper seed usage
Impact	CVSS 4.3. EPSS 0.0%. No patch confirmed.
Exploit ScenarioDerived	An attacker could exploit this vulnerability in the affected application to compromise the security of affected deployments, potentially impacting confidentiality, integrity, or availability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 19, 2026

CVE-2026-3503 is a security vulnerability (CVSS 4.3) that allows a physical attacker. Remediation should follow standard vulnerability management procedures.

Earlier versions of this analysis (1)

v1 Mar 19, 2026 - 19:00 CVSS 4.3

RemediationAI

Monitor vendor channels for patch availability.

Affected VersionsENISA

wolfSSL (wolfCrypt) 5.8.2 <5.9.0

Affected Packages

euvd wolfssl_wolfcrypt fix: 5.9.0

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Vulnerability type not specified by vendor.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 4.3 MEDIUM

CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N/U:Amber

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Physical

Attack Complexity

High

Attack Requirements

Present

Privileges Required

None

User Interaction

None

Vulnerable system: Confidentiality

High

Vulnerable system: Integrity

Low

Vulnerable system: Availability

None

Subsequent system: Confidentiality

Low

Subsequent system: Integrity

Low

Subsequent system: Availability

None

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

CVE Published

Mar 19, 2026 - 18:12 nvd

MEDIUM 4.3

DescriptionCVE.org

Protection mechanism failure in wolfCrypt post-quantum implementations (ML-KEM and ML-DSA) in wolfSSL on ARM Cortex-M microcontrollers allows a physical attacker to compromise key material and/or cryptographic outcomes via induced transient faults that corrupt or redirect seed/pointer values during Keccak-based expansion.

This issue affects wolfSSL (wolfCrypt): commit hash d86575c766e6e67ef93545fa69c04d6eb49400c6.

Executive ViewAI

Why It Matters

CVE-2026-3503 presents moderate security risk rated CVSS 4.3. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low

Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score

0.0%

Top 94% exploitable

Data Quality

7 sources

Confidence: High

EUVD

NVD

CVE.org

EPSS Vendor

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.0%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact

Low

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +22

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Same weakness CWE-335 – Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)

View all

CVE-2017-11519 CRITICAL POC

9.8

CVE-2021-41117 CRITICAL POC

9.1

CVE-2024-27632 HIGH POC

8.8

CVE-2016-10180 HIGH POC

7.5

CVE-2018-12520 HIGH POC

8.1

CVE-2017-5214 HIGH POC

7.5

CVE-2020-13784 HIGH POC

7.5

CVE-2024-36048 CRITICAL

9.8

Same technique Information Disclosure

View all

CVE-2019-2725 CRITICAL POC

9.8

CVE-2021-34523 CRITICAL POC

9.0

CVE-2013-2251 CRITICAL POC

9.8

CVE-2017-5638 CRITICAL POC

9.8

CVE-2025-24813 CRITICAL POC

9.8

CVE-2025-68613 HIGH POC

8.8

CVE-2015-1701 HIGH POC

7.8

CVE-2017-0147 HIGH POC

7.5

Vendor StatusVendor

Debian

wolfssl

Release	Status	Fixed Version	Urgency
bullseye	vulnerable	4.6.0+p1-0+deb11u2	-
bookworm	vulnerable	5.5.4-2+deb12u2	-
trixie	vulnerable	5.7.2-0.1+deb13u1	-
forky, sid	vulnerable	5.8.4-1	-
(unstable)	fixed	(unfixed)	-

References

Advisories & patches

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-3503 ADVISORY https://vuldb.com/?id.351746 REF https://github.com/wolfSSL/wolfssl/pull/9734

Search Externally

GitHub PoC

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