NVD / CVE Program· CNA hackerone

CVE-2026-21708: A vulnerability allowing a Backup Viewer to perform remote code execution (RCE) as the postgres user.

Noroxi assessment

Priority: Monitor (action score 39/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 1.1% (FIRST EPSS); higher than 67.1% of all records.
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Veeam Backup and Replication 12.3.2, 13.0.1.

Low priority for now. Upgrade to Veeam Backup and Replication 12.3.2, 13.0.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

CriticalCVSS 9.9 · v3.1—No exploit Fix available

Published: Mar 12, 2026
Updated: Jun 17, 2026
EPSS: 1.1% · 67th percentile
CWE: CWE-89

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 39 / 40 · 9.9 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 1.1%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
veeam	veeam backup \& replication	cpe:2.3:a:veeam:veeam_backup_\&_replication

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

veeam veeam backup & replication12.0.0.1402 and later · before 12.3.2.4465.

Versions reported by the vendor

Affected version ranges reported by the assigning authority (hackerone). Independent of NVD's CPE analysis and usually ahead of it.

Veeam Backup and Replication
- 12 and later · before 12.3.2affected · semver
- 13 and later · before 13.0.1affected · semver

Same product

veeam: all records

Other highest-scoring records for the same primary product.

CVE-2024-40711A deserialization of untrusted data vulnerability with a malicious payload can allow an unauthenticated remote code execution (RCE).KEV
96Now
CVE-2023-27532Vulnerability in Veeam Backup & Replication component allows encrypted credentials stored in the configuration database to be obtained.KEV
84Now
CVE-2022-26501Veeam Backup & Replication 10.x and 11.x has Incorrect Access Control (issue 1 of 2).KEV
70This week

Published before and after this one in the same product

← EarlierCVE-2026-21669Mar 12, 2026 · A vulnerability allowing an authenticated domain user to perform remote code execution (RCE) on the Backup Server.
39Monitor
← EarlierCVE-2026-21670Mar 12, 2026 · A vulnerability allowing a low-privileged user to extract saved SSH credentials.
26Monitor
← EarlierCVE-2026-21671Mar 12, 2026 · A vulnerability allowing an authenticated user with the Backup Administrator role to perform remote code execution (RCE) in high availabilit
36Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Veeam Backup and Replication	12.3.2	Vendor (CNA)
Veeam Backup and Replication	13.0.1	Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

VeeamHackerOne · disclosure only (VDP)

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: low · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Changed
Confidentiality impact: High
Integrity impact: High
Availability impact: Low

Weakness class (CWE)

CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

CVSS vector

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

nvd-secondary

Root cause

The query text is built by concatenating user input. The database cannot tell where the data ends and the command begins.

The bug in code

The whole CWE-89 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const owner = req.query.owner;
2const rows = await db.query(
3  "SELECT * FROM files WHERE owner = '" + owner + "'"
4);

Fixed

1const owner = req.query.owner;
2const rows = await db.query(
3  "SELECT * FROM files WHERE owner = $1",
4  [owner]
5);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:11 PM UTC

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References

www.veeam.com/kb4830

Show all references (1 more)

www.veeam.com/kb4831

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records