CVE-2025-56266

CRITICALNVD 9.89.8—Trending — 3 sources updated this weekElevated

9.8

A Host Header Injection vulnerability in Avigilon ACM v7.10.0.20 allows attackers to execute arbitrary code via supplying a crafted URL.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 91.3%
KEV: Not listed

Published

September 8, 2025

Last Modified

September 12, 2025

References (3)

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 11× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 23:17 UTCEG score recompute
2026-05-29 23:17 UTCGHSA enrichment
2026-05-29 13:44 UTCepss_batch

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Nucleihttp/cves/2025/CVE-2025-56266.yaml
First seen Jan 1, 2025
Avigilon ACM - Host Header Injection
Open source ↗

Frequently asked(5)

What is CVE-2025-56266?

CVE-2025-56266 is a critical vulnerability published on September 8, 2025. A Host Header Injection vulnerability in Avigilon ACM v7.10.0.20 allows attackers to execute arbitrary code via supplying a crafted URL.

When was CVE-2025-56266 disclosed?

CVE-2025-56266 was first published in the National Vulnerability Database on September 8, 2025, with the most recent update on September 12, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-56266 actively exploited?

CVE-2025-56266 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-56266?

CVE-2025-56266 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2025-56266?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-56266, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2025-56266

📅 Published

🔄 Last Modified

🔗 References (3)

Weakness Classification(3)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-56266?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (3)

Frequently asked(5)

Related CVEs(same CWE)