CVE-2021-36776: A Improper Access Control vulnerability in SUSE Rancher allows remote attackers impersonate arbitrary users

Q: How do I fix CVE-2021-36776?

rancher: upgrade to 2.5.10. Exact commands for each OS are on this page.

Q: Is CVE-2021-36776 being exploited?

CVE-2021-36776 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-2021-36776 affect?

CVE-2021-36776 affects rancher. Severity is high (CVSS 8.8). A Improper Access Control vulnerability in SUSE Rancher allows remote attackers impersonate arbitrary users. This issue affects: SUSE Rancher Rancher versions prior to 2.5.10.

This month

HIGH 8.8UPGRADE

CVE-2021-36776 is a high-severity flaw (CVSS 8.8) affecting rancher. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A Improper Access Control vulnerability in SUSE Rancher allows remote attackers impersonate arbitrary users. This issue affects: SUSE Rancher Rancher versions prior to 2.5.10.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-284
Published	2022-04-04
Last modified	2026-06-17

Publisher (CNA): SUSE · Vendor: rancher

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-04-04 13:15 UTCPublished CVE record published
2026-06-17 03:59 UTCUpdated Record last modified

rancher rancher UPGRADE

Affected: < 2.5.10

Fixed in: 2.5.10

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy rancher || rpm -q rancher || rancher --version

2. UPGRADE to 2.5.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rancher

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rancher

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-2021-36776?

rancher: upgrade to 2.5.10. Exact commands for each OS are on this page.

Is CVE-2021-36776 being exploited?

CVE-2021-36776 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-2021-36776 affect?

CVE-2021-36776 affects rancher. Severity is high (CVSS 8.8). A Improper Access Control vulnerability in SUSE Rancher allows remote attackers impersonate arbitrary users. This issue affects: SUSE Rancher Rancher versions prior to 2.5.10.

How urgent is CVE-2021-36776?

Priority 47/100. High severity

Software pages

Rancher vulnerabilities

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References

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