Veeam Backup & Replication: Improper Authentication
CVE-2022-26504 is a high-severity improper authentication vulnerability in Veeam Backup & Replication from Veeam, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists versions 10.0.1.4854, 11.0.1.1261 as the first without the flaw, so updating Veeam Backup & Replication to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 2.43% chance of exploitation within 30 days, higher than 85% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Veeam Backup & Replication to 10.0.1.4854 or 11.0.1.1261, whichever matches your release line, or a later version.
- Read the advisory on veeam.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Veeam | Veeam Backup & Replication | 10.0.0.4442 up to, but not including, 10.0.1.4854; 11.0.0.825 up to, but not including, 11.0.1.1261; 9.5.0.1536; 9.5.4.2615; 10.0.1.4854; 11.0.1.1261 | 10.0.1.4854, 11.0.1.1261 |
Version data comes from NVD's product matching. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.8 | High | NVD |
| CVSS 2.0 | 9.0 | High | NVD |
Official description
Improper authentication in Veeam Backup & Replication 9.5U3, 9.5U4,10.x and 11.x component used for Microsoft System Center Virtual Machine Manager (SCVMM) allows attackers execute arbitrary code via Veeam.Backup.PSManager.exe
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How developers prevent this class of flaw
- Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Advisories
Other vulnerabilities in Veeam Backup & Replication
- 9.1 Critical severity
- 9.0 Critical severity
- 9.1 Critical severity
- 9.9 Critical severity
- 8.8 High severity
- 8.1 High severity
Recent Improper Authentication vulnerabilities
- 7.5 High severity
- 8.8 High severity
- 7.8 High severity
- 7.8 High severity
- 9.1 Critical severity
- 7.4 High severity
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