CVE-2026-76443

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
EPSS0.5%
Percentile43th
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-707: CWE-707
Related Attack Patterns (CAPEC)
CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
via CWE-707
CAPEC-7 Blind SQL Injection
via CWE-707
CAPEC-43 Exploiting Multiple Input Interpretation Layers
via CWE-707
CAPEC-52 Embedding NULL Bytes
via CWE-707
CAPEC-53 Postfix, Null Terminate, and Backslash
via CWE-707
Show all 16

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

◆ AI Analysis — automated analysis, not human-reviewed

A critical severity vulnerability (CVE-2026-76443) 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-2026-76443?
A critical severity vulnerability (CVE-2026-76443) 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-2026-76443?
CVE-2026-76443 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: 0.5%.
Is CVE-2026-76443 actively exploited?
No confirmed active exploitation of CVE-2026-76443 as of 2026-09-25.
How do I remediate CVE-2026-76443?
Apply vendor patches for CVE-2026-76443. Monitor Cisco advisories.
What systems are affected by CVE-2026-76443?
CVE-2026-76443 affects: Cisco.
Vulnerability Details
CVE IDCVE-2026-76443
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-707
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-2026-76443 are related to issues with improper neutralization that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-707.

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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