[UPDATE] [low] NGINX: Vulnerability enables information disclosure

lowCVE-2025-53859

A remote, anonymous attacker can exploit a vulnerability in NGINX and NGINX NGINX Plus to disclose information.

CSIRTS triage

vendor: NGINX product: NGINX Information disclosure

What: A remote attacker can disclose information in NGINX and NGINX Plus through an unspecified vulnerability.
Who is affected: NGINX and NGINX Plus deployments are affected.
Urgency: Low priority; information disclosure without authentication has lower severity than RCE or auth bypass.
Action: Update NGINX or NGINX Plus to a patched version addressing CVE-2025-53859.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: low
Published: 2026-08-17
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2025-1817

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2025-538590.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2025-53859	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[NEW] [high] Splunk SOAR: Multiple vulnerabilitiescert-bund

Recent advisories for NGINX

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

high[UPDATE] [high] NGINX Open Source and NGINX Plus: Multiple vulnerabilitiescert-bund · 2026-08-25
high[UPDATE] [high] NGINX and NGINX Plus: Multiple vulnerabilitiescert-bund · 2026-08-25
high[UPDATE] [high] NGINX Open Source and NGINX Plus: Vulnerability allows denial of service and potentially code …cert-bund · 2026-08-25
high[UPDATE] [high] NGINX and NGINX Plus: Multiple vulnerabilitiescert-bund · 2026-08-25
high[NEW] [high] NGINX NGINX Plus: Multiple vulnerabilitiescert-bund · 2026-08-25
unknownUSN-8563-4: nginx regressionubuntu · 2026-08-19