CVE-2026-20336

highpriority · track · 35EPSS 0.003 · 23 %ileDEUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.31% (23rd) EPSS
CVSS 8.8 · high
Is it mine?
1,083 products
Check your exposure
Who says so?
2 sources
cert_bund · cisco_csaf

EPSS · scored 2026-10-26

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Security Appliance Software, Cisco Secure Firewall Threat Defense Software and Cisco Secure Firewall Management Center Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20336 are related to issues concerning improper control of a resource through its lifetime that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-664.

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.

8.8
010

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

v3.18.8highCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · psirt@cisco.com USexploitability 2.8 · impact 5.9
v3.18.1highCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.18.8highCVSS:3.1/AV:A/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: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-664US
05

affected products (1,083)

Products and version ranges known to be affected.

showing 20 of 1,083
06

advisories (2)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-3417Cisco Secure Firewall Management Center: Mehrere SchwachstellenDeutsch2026-09-16csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Cisco Secure Firewall Management Center ausnutzen, um Sicherheitsmaßnahmen zu umgehen, beliebige Befehle als Root auszuführen, Berechtigungen auf Root zu erweitern, SQL-Injection durchzuführen, Anmeldedaten für Administratorsitzungen zu erlangen, sensible Daten zu manipulieren und offenzulegen oder Denial-of-Service-Zustände herbeizuführen.

  • cisco-sa-hardening-asaftdfmc-uvpPROhNCisco Secure Firewall Adaptive Security Appliance, Secure Firewall Threat Defense, and Secure Firewall Management Center Software Hardening Release: September 20262026-09-16csaf · cisco_csafUS

    As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, Cisco Secure Firewall Threat Defense (FTD) Software and Cisco Secure Firewall Management Center (FMC) Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. These vulnerabilities were found during internal testing. Two of them are known to be actively exploited. For more information, see the following advisories: Cisco Secure Firewall Management Center Software Static Credential Vulnerability ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh"] and Cisco Secure Firewall Management Center Software Authentication Bypass Vulnerability ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-onprem-fmc-authbypass-5JPp45V2"]. To assist customers in patching and to streamline the disclosure process, Cisco has grouped these issues by their underlying vulnerability class — Common Weakness Enumeration (CWE) — and assigned a single Common Vulnerabilities and Exposures Identifier (CVE ID) to each CWE grouping. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is part of a group of advisories. For a complete list of the advisories and links to them, see Cisco Advance Notification for Publication of September 16, 2026, Security Advisories ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-notice-jfxK98ZP"].

07

sources

Which sources assert this record, and when.

cert_bundcisco_csafNVDCVE.orgMITRE
published 2026-09-16modified 2026-09-18
08

references (1) nvd

External citations — patches, advisories, analysis.

scry

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