CVE-2026-105134 explained: the Ahsay Cloud Backup Suite flaw and how to fix it

The two-minute check

1. Find the computer, phone or server you run Ahsay Cloud Backup Suite on.
2. Open the software and look for a version number, usually on the login screen or in an "About" section.
3. Check whether that version is 10.3.2 or earlier. The record lists those versions as affected.

When you can stop reading

If you don't run Ahsay Cloud Backup Suite anywhere in your business, none of this applies to you. The flaws live only in this product's Replication Receiver and API components, not in other software. Close this tab and get back to work.

What the official record says

CVE-2026-105134 scores a maximum CVSS 10 CRITICAL on the Common Vulnerability Scoring System (CVSS) version 3.1 (NVD). An attacker can reach it over the network without being on your local system. They need no password and no click from anyone in your office. If it succeeds, they can read, change, or destroy data on the backup server.

This bug also carries a 4.8% probability of exploitation in the next 30 days, placing it in the 92nd percentile of the Exploit Prediction Scoring System (EPSS) (FIRST.org). That score forecasts the chance of attack activity in the coming month. It does not measure how severe the flaw itself is.

The same update also closes CVE-2026-105133, a separate flaw in the product's API that lets an attacker bypass a password check (NVD). The record only lists CVE-2026-105134 on the federal known-exploited list, not its sibling. You install one update to close both.

What that means for a business like yours

A maximum CVSS score means the attacker needs nothing extra. No password, no click, no inside access. Once in, they can reach whatever this backup server can see, including the backups stored on it. This is the system meant to protect your data, so a break-in here could put your recovery copies out of reach too.

If someone else manages your IT

If a provider looks after your backups, send them a short message. Keep it to three plain asks.

"Hi — can you confirm which version of Ahsay Cloud Backup Suite we're running? Please update it to version 10.3.4 if it isn't already there. Let me know once that's done."

If you manage it yourself

1. Open Ahsay Cloud Backup Suite's admin console.
2. Check the version number shown on the dashboard or login screen.
3. If it reads 10.3.2 or earlier, open the vendor's release notes for version 10.3.4.
4. Follow the upgrade steps listed there.
5. Restart the service once the upgrade finishes.
6. Confirm the version number now reads 10.3.4.

This flaw is already on the CISA Known Exploited Vulnerabilities (KEV) catalog (CISA). Federal agencies have a deadline of October 17, 2026 to fix it. Criminals are already using this flaw, so the honest answer is now, not next month.

Open Ahsay Cloud Backup Suite again after the update finishes. Look at the version number on the login screen or admin dashboard. It should read 10.3.4, matching the vendor's release notes. If it still shows 10.3.2 or earlier, the update did not complete and you should try again.

If you cannot update immediately, limit who can reach the Ahsay Cloud Backup Suite admin interface from outside your network. Put it behind a virtual private network (VPN) so only staff with a company login can reach it remotely. This does not fix the flaw. It only reduces who can try to exploit it while you arrange the update.

You can also tighten who holds admin rights to the backup console in the meantime. Our privileged access management approach is built for exactly this kind of gap. If backups and patching aren't something your team has time to track day to day, our managed IT services cover this as routine maintenance, not a one-off scramble.

Do I have to do anything if we only use this at home?

Yes. The same fix applies whether the account is personal or business. The flaw doesn't check who owns it. Check the version number and update it the same way described above.

Will updating break anything?

The record doesn't say whether this update changes other features. Vendor updates like this usually close a security gap without changing daily use. Check the vendor's release notes before you update, just in case.

What if we use a third-party provider for backups instead of running this ourselves?

Then this fix is their responsibility, not yours directly. Ask them whether their systems run Ahsay Cloud Backup Suite, and whether they've applied the update. If you don't get a clear answer, that's worth following up on.

Does this affect our other business software?

No. The record only names Ahsay Cloud Backup Suite as affected. If you don't run this product, nothing here applies to your other systems.

How do we make sure something like this doesn't happen again?

No single fix prevents every future flaw. Keeping software updated, limiting who can reach admin consoles, and reviewing your setup regularly all help. Our cybersecurity services cover that ongoing work, including checks tied to rules like the FTC Safeguards Rule or HIPAA if those apply to you.

If you want a second set of eyes on this patch or on your wider security setup, request a free IT assessment or contact LayerLogix. We're 100% Texas-based, with 20+ years of experience and business-hours support with after-hours emergency response.