CVE-2022-46505

highpriority · track · 40EPSS 0.009 · 58 %ileexploit · PoCDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.86% (58th) EPSS

CVSS 7.5 · high

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-28

An issue in MatrixSSL 4.5.1-open and earlier leads to failure to securely check the SessionID field, resulting in the misuse of an all-zero MasterSecret that can decrypt secret data.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondaryexploitability 3.9 · impact 3.6

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Psecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-665USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

SmallTown123/details-for-CVE-2022-46505MatrixSSL session resume bugPoC · poc_in_github

affected products (3)

Products and version ranges known to be affected.

Open Source MatrixSSL <= 4.5.1-openall versionscert_bundDEcpe:/a:matrixssl:matrixssl:4.5.1-open
n/a n/a≤ n/aenisa_euvdEU
matrixssl matrixssl≤ 4.5.1nvdUScpe:2.3:a:matrixssl:matrixssl:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-0146MatrixSSL: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2023-01-18csaf · cert_bundDE
Ein Angreifer kann eine Schwachstelle in MatrixSSL ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2023-01-18modified 2026-06-17

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+655 more

references (7)

External citations — patches, advisories, analysis.

scry

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