CVE-2019-12583Uag2100 Firmware Vulnerability
Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator.
Published Jun 27, 2019 · Updated Nov 21, 2024
Key Facts
Patch in the next maintenance window- CVE-2019-12583 is a critical-severity vulnerability (CVSS 9.1 v3) affecting Uag2100 Firmware (Zyxel), Uag4100 Firmware (Zyxel), Uag5100 Firmware (Zyxel) and 11 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 44% probability of exploitation in the next 30 days.
- Fixed versions are available, including Uag2100 Firmware <=4.18\(aaiz.1\)c0, Uag4100 Firmware <=4.18\(aatd.1\)c0, Uag5100 Firmware <=4.18\(aapn.1\)c0.
- Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
Scores
CVSS v3
9.1
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS (30-day exploit likelihood)
44%
Higher than 98.7% of all scored CVEs
Exploit maturity
None known
ATLAS score
36/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
None known
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
Description
Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service.
Affected Products
14 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Uag2100 FirmwareZyxel | See advisory | 4.18\(aaiz.1\)c0 |
| Uag4100 FirmwareZyxel | See advisory | 4.18\(aatd.1\)c0 |
| Uag5100 FirmwareZyxel | See advisory | 4.18\(aapn.1\)c0 |
| Usg1100 FirmwareZyxel | See advisory | 4.33\(aapk.0\)c0 |
| Usg110 FirmwareZyxel | See advisory | 4.33\(aaph.0\)c0 |
Patched Releases
Uag2100 Firmware
<=4.18\(aaiz.1\)c0
Uag4100 Firmware
<=4.18\(aatd.1\)c0
Uag5100 Firmware
<=4.18\(aapn.1\)c0
Usg110 Firmware
<=4.33\(aaph.0\)c0
Usg1100 Firmware
<=4.33\(aapk.0\)c0
Usg1900 Firmware
<=4.33\(aapl.0\)c0
Usg210 Firmware
<=4.33\(aapi.0\)c0
Usg2200-VPN Firmware
<=4.33\(abae.0\)c0
Usg310 Firmware
<=4.33\(aapj.0\)c0
Zywall 110 Firmware
<=4.33\(aaaa.0\)c0
Zywall 1100 Firmware
<=4.33\(aaac.0\)c0
Zywall 310 Firmware
<=4.33\(aaab.0\)c0
Zywall Vpn100 Firmware
<=10.02\(abfv.0\)c0
Zywall Vpn300 Firmware
<=10.02\(abfc.0\)c0
Timeline
Publicly disclosed
Jun 27, 2019
Last updated
Nov 21, 2024
Weakness Type
- CWE-425 Direct Request ('Forced Browsing')
FAQ
Common Questions.
Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator.
Affected: Uag2100 Firmware (Zyxel); Uag4100 Firmware (Zyxel); Uag5100 Firmware (Zyxel), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Uag2100 Firmware <=4.18\(aaiz.1\)c0, Uag4100 Firmware <=4.18\(aatd.1\)c0, Uag5100 Firmware <=4.18\(aapn.1\)c0.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
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