CVE-2026-76440

CRITICAL

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Email Gateway and Cisco Secure Email and Web Manager engineering team has conducted a comprehensive...

Affects 0 products across 1 vendor.

CVSS 3.19.8
EPSS0.6%
Percentile48th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-23: CWE-23
Related Attack Patterns (CAPEC)
CAPEC-76 Manipulating Web Input to File System Calls
via CWE-23
CAPEC-139 Relative Path Traversal
via CWE-23

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

A critical severity vulnerability (CVE-2026-76440) affects the target system. As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Email Gateway and Cisco Secure Email and Web Manager engineering team has conducted a comprehensive internal security review. This review resulted in so...

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Frequently Asked Questions
What is CVE-2026-76440?
A critical severity vulnerability (CVE-2026-76440) affects the target system. As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Email Gateway and Cisco Secure Email and Web Manager engineering team has conducted a comprehensive internal security review. This review resulted in so...
What is the CVSS score for CVE-2026-76440?
CVE-2026-76440 has CVSS 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 0.6%.
Is CVE-2026-76440 actively exploited?
No confirmed active exploitation of CVE-2026-76440 as of 2026-09-25.
How do I remediate CVE-2026-76440?
Apply vendor patches for CVE-2026-76440. Monitor Cisco advisories.
What systems are affected by CVE-2026-76440?
CVE-2026-76440 affects: Cisco.
Vulnerability Details
CVE IDCVE-2026-76440
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2026-09-14
Last Modified2026-09-15
ICS Relevance55%
Weakness (CWE)
CWE-23
SourceNVD
Official Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Email Gateway and Cisco Secure Email and Web Manager engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76440 are related to path traversal issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-23.

Source: NIST NVD / MITRE CVE Database

Affected Products
VendorProductFixed Version
Cisco — —
Remediation

No patch URL on record. Monitor vendor security advisories directly.

Threat Intelligence
● Threat Intelligence Validated: September 2026 | Threat Age: 13 Days
CISA KEVNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
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