CVE-2026-23999: fleetdm fleet · Weak Randomness
Affects fleetdm fleetSource CVE Database V5
Not known to be exploited · CVSS 0.6 Low : upgrade to 4.80.1 when convenient.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 4.80.1
CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:UExploitation evidence
Disclosed: evidence found.
CVE published 26 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade fleet and fleetdm/fleet to 4.80.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| fleetdmfleet | Affected
| Fixed in
|
GitHubfleetdm/fleetpkg:github/fleetdm/fleetOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Organizations should upgrade Fleet to version 4.80.1 or later immediately to ensure the PIN generation uses sufficient entropy and is not predictable. Until upgraded, physical security controls should be strengthened to prevent unauthorized physical access to devices, especially those that may be locked remotely. Monitoring and alerting on device lock and wipe events can help detect suspicious activity. Rate limiting and lockout policies on devices should be reviewed and enforced to minimize brute force attempts. Additionally, organizations should consider implementing multi-factor authentication or additional device protection mechanisms beyond the Fleet PIN where possible. Regular audits of device management configurations and incident response plans for lost or stolen devices will further reduce risk. Since no workarounds exist, patching is the primary remediation.
Description
Fleet is open source device management software. In versions prior to 4.80.1, Fleet generated device lock and wipe PINs using a predictable algorithm based solely on the current Unix timestamp. Because no secret key or additional entropy was used, the resulting PIN could potentially be derived if the approximate time the device was locked is known. Fleet’s device lock and wipe commands generate a 6-digit PIN that is displayed to administrators for unlocking a device. In affected versions, this PIN was deterministically derived from the current timestamp. An attacker with physical possession of a locked device and knowledge of the approximate time the lock command was issued could theoretically predict the correct PIN within a limited search window. However, successful exploitation is constrained by multiple factors: Physical access to the device is required, the approximate lock time must be known, the operating system enforces rate limiting on PIN entry attempts, attempts would need to be spread over, and device wipe operations would typically complete before sufficient attempts could be made. As a result, this issue does not allow remote exploitation, fleet-wide compromise, or bypass of Fleet authentication controls. Version 4.80.1 contains a patch. No known workarounds are available.