September 21, 2026

CVE Watchtower

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CVE-2026-94056NVD

Vulnerability Summary

Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, allows attackers to read certain uninitialized data from stack memory.
Severity Level
HIGH(7.5)
Published Date
Sep 19, 2026
Last Modified
Sep 19, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.25%Probability
Root Weakness (CWE)
CWE-908: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v3.1 Base Metrics — Score 7.5 (HIGH)
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeChanged
ConfidentialityHigh
IntegrityNone
AvailabilityLow

Affected & Patched Versions

Affected Versions
  • Exim Exim >= 4.83 and < 4.100.1
Patched Versions
  • Exim Exim 4.100.1
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📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
⚙️Custom EPSS — Filter noise, focus on risk.
💬Webhooks — Slack & Teams integration.
🚫Ad-Free — Uninterrupted experience.

External References