CVE-2026-76519

criticalpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.016 · 75 %ileexploit · PoCDEFRNLRUUS
grimoire priorityP0 · Act now
Exploitable?
Yes · in the wild
CISA KEV · 1 exploit · PoC
Likely / severe?
1.57% (75th) EPSS
CVSS 9.8 · critical
Is it mine?
56 products
Check your exposure
Who says so?
5 sources
fstec_bdu · cert_bund · cisco_csaf · ncsc_nl

added 2026-10-14remediate by 2026-10-17

required action Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

EPSS · scored 2026-10-24

Cisco Secure Email Gateway Relative Path Traversal Vulnerability

A vulnerability in the Advanced Malware Protection (AMP) feature of Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to write arbitrary files on the underlying operating system. This vulnerability is due to improper handling of email attachments when the file reputation service is enabled. An attacker could exploit this vulnerability by sending an email that contains a crafted attachment through an affected device. A successful exploit could allow the attacker to write arbitrary files and execute commands with root privileges on the underlying operating system.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

02

cvss

Technical severity, 0–10. One row per scoring source.

9.8
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · psirt@cisco.com USexploitability 3.9 · impact 5.9
v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · NCSC-NL NL
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · Cisco PSIRT US
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-23USCWE-23USCWE-23US
05

exploits (1)

Public proof-of-concept and weaponised exploit code.

06

affected products (56)

Products and version ranges known to be affected.

showing 20 of 56
07

advisories (4)

Vendor and ecosystem advisories describing this.

  • NCSC-2026-0429Kwetsbaarheid verholpen in Cisco Secure Email GatewayNL2026-10-14csaf · ncsc_nlNL

    Cisco heeft een kwetsbaarheid verholpen in Cisco Secure Email Gateway, specifiek in de Advanced Malware Protection feature.

  • WID-SEC-W-2026-3963Cisco Secure Email Gateway: Schwachstelle ermöglicht Ausführen von beliebigem Programmcode mit AdministratorrechtenDeutsch2026-10-14csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Cisco Secure Email Gateway ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen.

  • cisco-sa-esa-afw-zqYJkjxpCisco Secure Email Gateway Arbitrary File Write Vulnerability2026-10-14csaf · cisco_csafUS

    A vulnerability in the Advanced Malware Protection (AMP) feature of Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to write arbitrary files on the underlying operating system. This vulnerability is due to improper handling of email attachments when the file reputation service is enabled. An attacker could exploit this vulnerability by sending an email that contains a crafted attachment through an affected device. A successful exploit could allow the attacker to write arbitrary files and execute commands with root privileges on the underlying operating system. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. For further documentation of improvements and fixes in Cisco Secure Email Gateway, see Cisco Secure Email Gateway and Secure Email and Web Manager Security Hardening Release: September 2026 ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-esa-dfCrfXkm"].

  • CERTFR-2026-AVI-1325Vulnérabilité dans Cisco AsyncOS Software pour Secure Email GatewayFrançais2026-10-15vendor · certfrFR
08

also known as (2)

Other names and identifiers for this entity.

09

sources

Which sources assert this record, and when.

fstec_bducert_bundcisco_csafncsc_nlcertfrNVDCVE.orgMITRE
published 2026-10-14modified 2026-10-15
10

references (2) nvd

External citations — patches, advisories, analysis.

scry

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