CVE-2022-43755Network attack vector

Cluster-owner escalation via deterministic token regeneration

Published Feb 7, 2023 · Updated Mar 25, 2025

Insufficient entropy in Rancher 2.6.0 through 2.6.9 and 2.7.0 allows attackers to gain downstream cluster-owner access. The cattle-token secret used by cattle-cluster-agent contains no random value, so regeneration reproduces the compromised value instead of invalidating it. Exploitation requires prior knowledge of the token and grants owner privileges only in the affected downstream cluster, not Rancher's local cluster.

CVSS severity7.1
High
EPSS probability1.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient entropy in Rancher 2.6.0 through 2.6.9 and 2.7.0 allows attackers to gain downstream cluster-owner access. The cattle-token secret used by cattle-cluster-agent contains no random value, so regeneration reproduces the compromised value instead of invalidating it. Exploitation requires prior knowledge of the token and grants owner privileges only in the affected downstream cluster, not Rancher's local cluster.

The record

CVE
CVE-2022-43755
Published
Feb 7, 2023
Updated
Mar 25, 2025
Vendor
NeuVector
Product
Rancher
Classifications
CWE-331, CWE-330, T1550.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Rancher <2.6.10 changes=[{"at":"2.7.1","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

NeuVector · Rancherversion=Rancher <2.6.10 changes=[{"at":"2.7.1","status":"unaffected"}]

Published CVSS scores

7.1SUSECVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-331Insufficient Entropy
CWE-330Use of Insufficiently Random Values
T1550.001Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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