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Fencer Vulns
high 7.5

CVE-2019-16889 json

Ubiquiti EdgeMAX devices before 2.0.3 allow remote attackers to cause a denial of service (disk consumption) because *.cache files in /var/…

published 2019-09-25 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-7388

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.1%
EPSS 5.1% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

Ubiquiti EdgeMAX devices before 2.0.3 allow remote attackers to cause a denial of service (disk consumption) because *.cache files in /var/run/beaker/container_file/ are created when providing a valid length payload of 249 characters or fewer to the beaker.session.id cookie in a GET header. The attacker can use a long series of unique session IDs.

Patch / fix

  • ui er-x_firmware 2.0.3
  • ui er-x-sfp_firmware 2.0.3
  • ui ep-r6_firmware 2.0.3
  • ui erlite-3_firmware 2.0.3
  • ui erpoe-5_firmware 2.0.3
  • ui er-8_firmware 2.0.3
  • ui erpro-8_firmware 2.0.3
  • ui ep-r8_firmware 2.0.3
  • ui er-4_firmware 2.0.3
  • ui er-6p_firmware 2.0.3
  • ui er-12_firmware 2.0.3
  • ui er-8-xg_firmware 2.0.3

Exploit prediction

5.13% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • mjlanders.com https://mjlanders.com/2019/07/28/resource-consumption-dos-on-edgemax-v1-10-6/ referenced PoC, tagged "exploit" by a source, unverified
  • hackerone.com https://hackerone.com/reports/406614 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.