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CVE-2021-36776

28
FAUCET Score

CVE-2021-36776 is an Improper Access Control vulnerability in SUSE Rancher versions prior to 2.5.10, allowing remote attackers to impersonate arbitrary users. With a CVSS score of 8.8 (HIGH), this vulnerability is easily exploitable over the network with low privileges and no user interaction, potentially leading to full compromise of confidentiality, integrity, and availability. Despite its high severity, there is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.5.10CPE matchmatch criteria
cpe:2.3:a:rancher:rancher:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.07%
Probability of exploitation in next 30 days
EPSS Percentile
61.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0107 is in the 58th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

gopatch availablevia ghsa
Product: github.com/rancher/rancherFixed in: 2.5.10

Vendor Advisories (1)

goGHSA-gvh9-xgrq-r8hwhigh

Rancher's Steve API Component Improper authorization check allows privilege escalation

Apr 24, 2024

References

bugzilla.suse.com / show_bug.cgi
Issue TrackingThird Party Advisory