Secuno
ENNL
Book demo

CVE-2026-28321

SolarWinds Serv-u broken access control

9.1 CRITICALEPSS 0.58%
  1. Published21 Jul 2026

Description

SolarWinds Serv-U is affected by a broken access control vulnerability that could allow arbitrary file read and write, which can then be used to escalate privileges and execute code as root. A domain administrator access is required, and the impact is lower in Windows installations.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

SolarWinds Serv-u< 2026.3

Remediation

Fixed in
SolarWinds Serv-u≥ 2026.3

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-1075109.1
An authenticated high privilege user can inject arguments in troubleshooting commands…
CVE-2026-764989.8
As part of Cisco's ongoing commitment to proactive security and product quality, the…
CVE-2026-764638.8
As part of Cisco's ongoing commitment to proactive security and product quality, the…
CVE-2026-764559.8
As part of Cisco's ongoing commitment to proactive security and product quality, the…
CVE-2026-976808.3
IBM Langflow OSS 1.0.0 through 1.12.2 could allow a remote authenticated attacker to…
CVE-2026-1043358.8
IBM Langflow OSS 1.0.0 through 1.12.2 could allow a remote authenticated attacker to…

Frequently asked

Is CVE-2026-28321 being actively exploited?

CVE-2026-28321 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.58%.

How severe is CVE-2026-28321?

CVE-2026-28321 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.58% probability of exploitation.

Which products are affected by CVE-2026-28321?

Affected products include SolarWinds Serv-u.

How do I fix CVE-2026-28321?

Upgrade affected software to a fixed version, for example SolarWinds Serv-u 2026.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-28321 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.