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Sel 3350 FirmwareOperating system · Selinc

CVE-2023-31161

HIGH · 8.8 CVSS v3.1 Developing Published 2023-05-10
No fix yet
No fix has been published. The vendor has not shipped a fixed release or patch. You remain exposed.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable 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
An Improper Input Validation vulnerability in the Schweitzer Engineering Laboratories Real-Time Automation Controller (SEL RTAC) Web Interface could allow an authenticated remote attacker to use internal resources, allowing a variety of potential effects. See SEL Service Bulletin dated 2022-11-15 for more details.

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 · low confidence
Developing — this CVE was published recently and its authoritative NVD entry is still being established, so we're holding a technical summary until the source data settles rather than publish something unreliable. Re-checking after 2026-07-31.

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
Sel 3350 FirmwareOperating system
Affected:>= r148-v0, < r150-v2
Sel 3532 FirmwareOperating system
Affected:>= r143-v0, < r150-v2
Sel 3555 FirmwareOperating system
Affected:>= r143-v0, < r150-v2
Sel 3560e FirmwareOperating system
Affected:>= r144-v2, < r150-v2
Sel 3560s FirmwareOperating system
Affected:>= r144-v2, < r150-v2

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
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

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.

dbcve · scoped
Recommended fix High confidence

r150-v2 or later (firmware version r150-v2 addresses the improper input validation)

  1. 1. Identify the specific SEL RTAC model (3350, 3532, 3555, 3560e, or 3560s) from the physical device or management interface
  2. 2. Access the device through the console or network management interface
  3. 3. Backup the current device configuration following SEL backup procedures
  4. 4. Download the firmware version r150-v2 or later from the SEL customer portal (selinc.com)
  5. 5. Upload the firmware to the device through the Web Interface or other supported method
  6. 6. Follow SEL's official firmware upgrade procedure to apply the firmware
  7. 7. After reboot, verify the device is running firmware r150-v2 or later
  8. 8. Confirm the Web Interface is functional and the vulnerability is resolved
Caveat Review SEL Service Bulletin dated 2022-11-15 for any specific upgrade requirements or compatibility notes before proceeding

Generated from the published advisory — verify against the referenced sources before acting.

No vendor fix exists Sel 3350 Firmware has not published a patch for this.

There is no version to upgrade to and no patch to apply. Every affected install stays exposed until the vendor ships a fix — or somebody else builds one.

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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-2023-31161 in production — separate from our analysis above.

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What this is

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  • Version or environment caveats, and links to real fixes
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