CVE-2022-23304

Password recovery via nonconstant EAP-pwd elliptic-curve operations

Published Jan 17, 2022 · Updated Jul 14, 2026

Side-channel exposure in Siemens SIDIS Secured SmartPlug before V7.26.0310 allows local users to recover weak EAP-pwd passwords. The crypto_ec_point_solve_y_coord path delegates elliptic-curve point solving to external crypto functions whose nonconstant-time cache access exposes password-dependent differences. Exploitation requires unprivileged code on the same processor, EAP-pwd compiled and enabled, and a sufficiently weak password for offline dictionary recovery.

CVSS severity7.0
High
EPSS probability1.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Side-channel exposure in Siemens SIDIS Secured SmartPlug before V7.26.0310 allows local users to recover weak EAP-pwd passwords. The crypto_ec_point_solve_y_coord path delegates elliptic-curve point solving to external crypto functions whose nonconstant-time cache access exposes password-dependent differences. Exploitation requires unprivileged code on the same processor, EAP-pwd compiled and enabled, and a sufficiently weak password for offline dictionary recovery.

The record

CVE
CVE-2022-23304
Published
Jan 17, 2022
Updated
Jul 14, 2026
Vendor
Siemens
Product
SIDIS Secured SmartPlug
Classifications
CWE-203, CWE-924, T1110.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <V7.26.0310

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIDIS Secured SmartPlugversion=0 <V7.26.0310

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.0Siemens ProductCERTCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-203Observable Discrepancy
CWE-924Improper Enforcement of Message Integrity During Transmission in a Communication Channel
T1110.002Password Cracking

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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