Vulnerability
CVE-2026-55584
phpSysInfo: authentication bypass
Most severe levelDEFCON 4 · Moderate risk
Official data
- CVSS 3.1
- 7.5 · high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-290
- EPSS
- 1.91% probability of exploitation in the next 30 days, higher than 79% of CVEs
- CISA KEV catalogue
- No
Sources: NVD (CVSS, weakness, publication), FIRST (EPSS), CISA (KEV catalogue).
Data read on 25 October 2026.
Timeline
- 18 August 2026First in the DefenceLevel briefing
- 28 August 2026Published on NVD
In DefenceLevel briefings8 days
- 29 August 2026New in the last 24 hoursDEFCON 4
- 24 August 2026New in the last 24 hoursDEFCON 4
- 23 August 2026New in the last 24 hoursDEFCON 4
- 22 August 2026New in the last 24 hoursDEFCON 4
- 21 August 2026New in the last 24 hoursDEFCON 4
- 20 August 2026New in the last 24 hoursDEFCON 4
- 19 August 2026New in the last 24 hoursDEFCON 4
- 18 August 2026New in the last 24 hoursDEFCON 4
Last 12 months.
The full analysis is in the briefingThe full analysis is in your archive
Why it matters now, who is affected and what to do: every day at 05:00 UTC, for subscribers.Why it matters, who is affected and what to do, as in the daily briefing.