CVE-2026-49197

CRITICALNVD 9.89.8—Trending — 3 sources updated this week

9.8

Web endpoints intended for the Acer Connect app improperly validate the HTTP Authorization header, failing to block requests when Base64 decoding fails.

CVSS v3: 9.8
EG Score: 9.8(high)
EPSS: 17.1%
KEV: Not listed

Published

May 29, 2026

Last Modified

June 8, 2026

Advisory Details (1)

Auto-updated May 30, 2026

No patch confirmed yet.

generic

Security Advisory: Firmware Update for Acer Connect W6x Router - Acer Community

https://community.acer.com/en/kb/articles/19672

Vendor Advisories for CVE-2026-49197(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

GHSA-6pmc-5frg-fmg6
GitHub Security AdvisoriesCritical
Web endpoints intended for the Acer Connect app improperly validate the HTTP Authorization header...

Weakness Classification(1)

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

CWE-287Improper Authentication

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-09 17:16 UTCEG score recompute
2026-06-09 17:16 UTCGHSA enrichment
2026-06-09 13:29 UTCEG score recompute
2026-06-09 13:29 UTCGHSA enrichment
2026-06-09 09:41 UTCEG score recompute
2026-06-09 09:41 UTCGHSA enrichment
2026-06-09 05:54 UTCEG score recompute
2026-06-09 05:54 UTCGHSA enrichment
2026-06-09 02:06 UTCEG score recompute
2026-06-09 02:06 UTCGHSA enrichment
2026-06-08 22:18 UTCEG score recompute
2026-06-08 22:18 UTCGHSA enrichment
2026-06-08 18:30 UTCEG score recompute▼ 0.20
2026-06-08 18:30 UTCGHSA enrichment
2026-06-08 14:17 UTCEPSS rescore
2026-06-08 14:17 UTCEPSS rescore
2026-06-08 11:37 UTCEG score recompute
2026-06-08 11:37 UTCGHSA enrichment
2026-06-08 07:50 UTCEG score recompute
2026-06-08 07:50 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-49197?

CVE-2026-49197 is a critical vulnerability published on May 29, 2026. Web endpoints intended for the Acer Connect app improperly validate the HTTP Authorization header, failing to block requests when Base64 decoding fails.

When was CVE-2026-49197 disclosed?

CVE-2026-49197 was first published in the National Vulnerability Database on May 29, 2026, with the most recent update on June 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-49197 actively exploited?

CVE-2026-49197 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-49197?

CVE-2026-49197 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2026-49197?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49197, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-49197

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CVE-2026-49197

📅 Published

🔄 Last Modified

📋 Advisory Details (1)

Security Advisory: Firmware Update for Acer Connect W6x Router - Acer Community

📣 Vendor Advisories for CVE-2026-49197(1)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)