CVE-2026-28305: SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to rem

Q: How do I fix CVE-2026-28305?

serv-u: upgrade to 2026.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-28305 being exploited?

CVE-2026-28305 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-28305 affect?

CVE-2026-28305 affects serv-u. Severity is critical (CVSS 9.1). SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to remote code execution as root. A domain account with admin privileges and read and write access to the home directory is required. Th

Q: How urgent is CVE-2026-28305?

Priority 46/100. Critical severity

This month

CRITICAL 9.1UPGRADE

CVE-2026-28305 is a critical-severity flaw (CVSS 9.1) affecting serv-u. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to remote code execution as root. A domain account with admin privileges and read and write access to the home directory is required. The impact is lower in Windows deployments.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-639
Published	2026-07-21
Last modified	2026-10-24

Publisher (CNA): SolarWinds · Vendor: solarwinds

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-21 16:17 UTCPublished CVE record published
2026-10-24 20:10 UTCUpdated Record last modified

solarwinds serv-u UPGRADE

Affected: < 2026.3

Fixed in: 2026.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy serv-u || rpm -q serv-u || serv-u --version

2. UPGRADE to 2026.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade serv-u

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade serv-u

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-28305?

serv-u: upgrade to 2026.3. Exact commands for each OS are on this page.

Is CVE-2026-28305 being exploited?

CVE-2026-28305 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-28305 affect?

CVE-2026-28305 affects serv-u. Severity is critical (CVSS 9.1). SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to remote code execution as root. A domain account with admin privileges and read and write access to the home directory is required. Th

How urgent is CVE-2026-28305?

Priority 46/100. Critical severity

Software pages

Windows vulnerabilities

Related CVEs

CVE-2026-28316 CRITICAL 9.1 UPGRADE SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to pri
CVE-2026-28302 CRITICAL 9.1 UPGRADE SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to pri
CVE-2026-28304 CRITICAL 9.1 UPGRADE SolarWinds Serv-U is affected by a remote code execution vulnerability that, when exploited, can allow the arb
CVE-2026-28308 CRITICAL 9.1 UPGRADE SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to rem
CVE-2026-28312 CRITICAL 9.1 UPGRADE SolarWinds Serv-U is affected by a privilege escalation vulnerability

References

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