Sophos XGS 87: How to rollback to the previous image after a failed upgrade
By Sai Kiran Pandrala · reviewed by Sai Kiran Pandrala, Editor Last verified: 2026-05-30
| Vendor | Sophos |
|---|---|
| Operating system | SFOS (Sophos Firewall OS) |
| Category | Upgrade Failure |
| Skill level | Intermediate to advanced |
| DIY-able? | Yes with CLI access; some scenarios need Sophos Support + RMA. |
Image upgrades on Sophos platforms have one cardinal rule: verify the running image first. `system version (CLI)` on SFOS (Sophos Firewall OS) is the single most useful command in a change window because it tells you exactly what you are rolling back to if something breaks.
Across the XGS 87 family the upgrade syntax is `system firmware-upload type=usb`. pay attention to the activation step because SFOS (Sophos Firewall OS) treats download and activate as separate transactions. Forgetting the activation step is the single most common reason an 'upgrade' silently does nothing.
Sophos Support expects you to capture pre-upgrade state and have a console session open during the change window. Anything less is a support-case waste of time if it goes sideways.
What this guide covers
Rollback to the previous image after a failed upgrade on a Sophos XGS 87 (SFOS (Sophos Firewall OS)).
Step-by-step
- Confirm there's a previous image still on flash.
- Set the boot variable to that previous image.
- Reboot.
- Verify the version is back to the prior release.
- Investigate the upgrade failure separately, do not re-attempt without root cause.
CLI / commands
# Boot recovery prompt: Recovery console (USB)
# Verify image
system version (CLI)
# Upgrade
system firmware-upload type=usb
# Save / commit
(auto-saves in Web UI; CLI changes persist)
# Rollback
system backup-restore restore
Recovery options
- Boot loader recovery (Recovery console (USB))
- Rollback to the previous image with
system backup-restore restore - Force failover to a known-good standby (HA platforms)
Frequently asked questions
Will this work on my specific SFOS (Sophos Firewall OS) version?
The procedure reflects current SFOS (Sophos Firewall OS) behaviour. Older releases may need minor syntax adjustments: use the CLI help (? or tab-completion) to verify.
Should I open a Sophos Support case immediately?
Open one if you suspect hardware failure or the symptom persists after a maintenance-window reload. Make sure your support entitlement is active first.
Where can I find the Sophos official documentation?
https://support.sophos.com/support/s/, search the product family + feature name.
Is this procedure safe in production?
Test in a lab or maintenance window first. Capture pre-change state so you can roll back.
Related guides
Related fixes
Related guides worth a look while you sort this one out:
- Sophos XGS 107: How to rollback to the previous image after a failed upgrade
- Sophos XGS 116: How to rollback to the previous image after a failed upgrade
- Sophos XGS 126: How to rollback to the previous image after a failed upgrade
- Sophos AP6 420: How to rollback to the previous image after a failed upgrade
- Sophos AP6 420E: How to rollback to the previous image after a failed upgrade
- Sophos XGS 87: How to do an emergency image reload from the boot loader
References
- Sophos support portal: https://support.sophos.com
- Sophos knowledge base: https://support.sophos.com/support/s/
- Sophos security advisories: https://www.sophos.com/en-us/security-advisories
- Open a case: https://secure2.sophos.com/en-us/support.aspx
Reference material, not professional advice. Validate against your specific SFOS (Sophos Firewall OS) version and test in a non-production environment before applying.
Why this matters for your day-to-day
A Sophos device that's misbehaving costs more than the fix itself: lost productivity, missed calls, security risk, even safety risk in some categories. Treating the symptom quickly with a documented procedure is cheaper than letting it persist. The steps above are written to get you back to working in under an hour where possible, and to flag clearly when escalation is the right call.
Before you start
A few things to confirm so the Sophos device fix goes cleanly:
- Latest firmware downloaded if you're going to update.
- Warranty + support contract status checked. opening sealed parts may void it.
- Backup of current configuration (where applicable) taken.
- Spare parts on hand if you anticipate replacement.
- Adequate workspace, lighting, and time, rushing causes regressions.
How to confirm it's actually fixed
On a Sophos device, the test is rarely "reboot and see". Use this list:
- Active reproduction: trigger the original failure path on purpose.
- Indirect reproduction: do an activity that would expose the same subsystem.
- Status indicator review: every LED / display / app status should be green.
- 24-hour soak: leave the device under normal load overnight; check the next morning.
- Telemetry check: review the device or app's diagnostic log for new error entries.
Escalation guide
For a Sophos device, the right escalation depends on impact:
- Cosmetic / minor: log a ticket via the Sophos app or web portal. Response 1-3 business days.
- Mid-impact: phone support. Have your serial number ready.
- Critical (production down, safety issue): in-person dealer / TAC visit. Bring proof of purchase.
- Out of warranty: third-party repair shop with manufacturer-certified technicians.
More frequently asked questions
Will the procedure work on the international variant?
Some features and firmware paths are region-locked. Check the model spec sheet to confirm your variant supports the menu option referenced. If you're outside the US/EU, look for the regional support portal.
How often should I run preventive checks?
Quarterly for most consumer devices; monthly for production / commercial devices. Set a calendar reminder so the device stays healthy between issues.
Will this void my warranty?
Applying official firmware updates and following the user manual will not affect warranty. Opening sealed components, jumping safety circuits, or using third-party parts can void warranty in most jurisdictions.
Does this affect other devices on my network?
Generally no. The procedure is local to this device. Network-side changes (firmware updates that affect TLS, SMB, or routing) are flagged explicitly in the steps.
Is it safe to apply during business hours?
If the device is in production use, apply during a scheduled maintenance window. Most procedures need 2-15 minutes of downtime. Capture pre-change state so you can roll back if needed.