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Taskalfa 7550ci FirmwareOperating system · Kyocera

CVE-2022-41798

MEDIUM · 6.5 CVSS v3.1 Published 2022-12-05
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
70/100
Remediation priority · Elevated
No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Session information easily guessable vulnerability exists in Kyocera Document Solutions MFPs and printers, which may allow a network-adjacent attacker to log in to the product by spoofing a user with guessed session information. Affected products/versions are as follows: TASKalfa 7550ci/6550ci, TASKalfa 5550ci/4550ci/3550ci/3050ci, TASKalfa 255c/205c, TASKalfa 256ci/206ci, ECOSYS M6526cdn/M6526cidn, FS-C2126MFP/C2126MFP+/C2026MFP/C2026MFP+, TASKalfa 8000i/6500i, TASKalfa 5500i/4500i/3500i, TASKalfa 305/255, TASKalfa 306i/256i, LS-3140MFP/3140MFP+/3640MFP, ECOSYS M2535dn, LS-1135MFP/1035MFP, LS-C8650DN/C8600DN, ECOSYS P6026cdn, FS-C5250DN, LS-4300DN/4200DN/2100DN, ECOSYS P4040dn, ECOSYS P2135dn, and FS-1370DN.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Session tokens/IDs are generated using easily guessable patterns (likely sequential, time-based, or weak randomness), allowing a network-adjacent attacker to predict valid session identifiers and spoof authenticated user sessions to gain unauthorized access to the MFP/printer management interface.

MitigationApply vendor firmware patches from Kyocera Document Solutions; until patched, isolate affected devices on a restricted network segment to limit adjacent attacker access.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Taskalfa 7550ci FirmwareOperating system
Affected:all versions
Taskalfa 6550ci FirmwareOperating system
Affected:all versions
Taskalfa 5550ci FirmwareOperating system
Affected:all versions
Taskalfa 4550ci FirmwareOperating system
Affected:all versions
Taskalfa 3550ci FirmwareOperating system
Affected:all versions
Taskalfa 3050ci FirmwareOperating system
Affected:all versions
Taskalfa 255c FirmwareOperating system
Affected:all versions
Taskalfa 205c FirmwareOperating system
Affected:all versions

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the device model
    Access the device web interface or check the physical label to confirm the exact model number (Taskalfa 7550ci, 6550ci, 5550ci, 4550ci, 3550ci, 3050ci, 255c, or 205c)
    Affected if The device is any of these eight Taskalfa models
  2. Check the firmware version
    Log into the web management interface and navigate to the Device Information or System Status page to view the installed firmware version
    Affected if Any firmware version is present (all versions are affected)
  3. Confirm web management interface is enabled
    Attempt to access the device via HTTP or HTTPS (typically ports 80/443 or 8080) to verify the web UI is accessible
    Affected if The web management interface is reachable on the network
  4. Verify session token handling (optional probe)
    Log in to the web interface, then log out and log in again. Compare the session cookies or URL parameters between sessions to see if tokens follow a predictable pattern (sequential, time-based, or similar)
    Affected if Session identifiers appear sequential, time-derived, or otherwise predictable rather than cryptographically random

If the device is any Kyocera Taskalfa 7550ci/6550ci/5550ci/4550ci/3550ci/3050ci/255c/205c model with the web management interface accessible, the session token generation flaw is present in all firmware versions.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply vendor firmware patches from Kyocera Document Solutions; until patched, isolate affected devices on a restricted network segment to limit adjacent attacker access.

Fix this in Taskalfa 7550ci Firmware Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-41798 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data