Network Management

MIB Browser does not work with SNMPv3 nodes after upgrade to SolarWinds Platform 2026.1

After upgrading to SolarWinds Platform 2026.1, the MIB Browser fails to work against SNMPv3 nodes when launched from both the Management widget on the Node Details view and from Manage Pollers / Device Studio.

First published date

3/18/2026 2:28 PM

Last published date

7/29/2026 9:57 PM

Overview

After upgrading to SolarWinds Platform 2026.1, the MIB Browser fails to work against SNMPv3 nodes.

It affects the following features:

    • MIB Browser launched from Management widget on Node Details

    • MIB Browser used from Manage Pollers / Device Studio

    • SNMP type: SNMPv3 only

    • Status: Regression (works in 2025.4, broken in 2026.1)

You may experience some or all of the following:

  • Opening the MIB Browser on an SNMPv3 node and selecting an OID results in no response in the UI (no values returned).

  • The same behavior is seen:

    • From the Management widget (Node Details view)

    • From Manage Pollers → Device Studio MIB Browser

  • UnDP (Universal Device Poller) continues to work without issue on the same SNMPv3 nodes.

  • Device Studio pollers themselves (actual polling) work; only the MIB Browser paths are affected.

  • In OrionWeb.log, the following error is logged when using the MIB Browser against an SNMPv3 node:

    "Error 31209 - SNMP Version 3 Authorization Requested, but no/short AuthKey is set".

    Product section

    Orion Platform

    Cause

    During 2026.x development, a change was introduced to use a dedicated encryption key for the website CryptoHelper. This affected how encrypted SNMPv3 credential properties (such as AuthKey) are decrypted when constructing the Node object used by the SnmpPollingProvider for MIB Browser operations.

    Key technical points:

    • The MIB Browser obtains a Node object which includes SNMPv3 credentials via:

      • NodeDAL.GetSnmpv3Credentials → CredentialsProvider → ReadOnlyCredentialDAL → CryptoHelper.

    • With the new dedicated website encryption key, CryptoHelper fails to correctly decrypt the SNMPv3 credential fields when called from the MIB Browser code path.

    • As a result, the MIB Browser ends up with missing or short SNMPv3 AuthKey, triggering:

      Error 31209 - SNMP Version 3 Authorization Requested, but no/short AuthKey is set.

    • Device Studio pollers and UnDP use different execution paths that are not impacted by this key handling change, which is why polling continues to work while the interactive MIB Browser fails.

    This behavior is confirmed as a regression: it worked in 2025.4 (Polonium), but is broken in 2026.1 (Radium).

    Resolution

    This issue is addressed in SolarWinds Platform 2026.2. Consider upgrading your environment. 

    Workarounds (until upgrade)

    If upgrading immediately is not an option, the following workarounds can help mitigate impact:

    1. Use SNMPv2c temporarily for MIB Browser operations (where acceptable):

      • If security policy allows, configure a temporary SNMPv2c polling profile on a test node.

      • Use the MIB Browser against the SNMPv2c configuration to browse OIDs.

      • Revert to SNMPv3 once the environment is upgraded to a fixed version.

    2. Use UnDP / existing polling instead of MIB Browser for data validation:

      • Create or modify Universal Device Pollers (UnDP) for required OIDs.

      • Verify values via UnDP charts and resources rather than interactive MIB browsing.

      • This is supported by the observation that UnDP works without issue in affected builds.