CASCACascade Atlas

Evidence dossier

CVE-2026-20079

Cisco Secure Firewall Management Center Authentication Bypass Remote Code Execution Vulnerability

Exploited in the wild (CISA KEV since Sep 9, 2026). cisco reports CVSS 3.1 10.0. EPSS estimates 88.5% exploit likelihood as of Oct 21, 2026.

83.8–98.1Priority evidence range
Evidence through Oct 22, 2026, 6:07 PM UTC

As of Oct 22, 2026

Normalized restatement

A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to bypass authentication and execute script files on an affected device to obtain root access to the underlying operating system.  This vulnerability is due to an improper system process that is created at boot time. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute a variety of scripts and commands that allow root access to the device. 

State
PUBLISHED
Published
Mar 4, 2026
Updated
Sep 16, 2026
Evidence coverage
85%

Evidence chronology

What was known when

Download this view's receipt →
  1. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability
    Original evidence ↗
  2. Source dateSource date omittedFirst observed by CASCA
    CISA-ADP

    Record text: CISA ADP Vulnrichment

    Inspect raw assertion
    Field
    container
    Value
    CISA ADP Vulnrichment
    Original evidence ↗
  3. Source dateSource date omittedFirst observed by CASCA
    cisco

    Record text: Cisco Secure Firewall Management Center Authentication Bypass Remote Code Execution Vulnerability

    Inspect raw assertion
    Field
    container
    Value
    Cisco Secure Firewall Management Center Authentication Bypass Remote Code Execution Vulnerability
    Original evidence ↗
  4. Source dateSource date omittedFirst observed by CASCA
    CVE Program

    Record text: CVE Program Container

    Inspect raw assertion
    Field
    container
    Value
    CVE Program Container
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 88.47% probability · 99.77th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.884720000000; percentile 0.997740000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Sep 9, 2026 · first observed Sep 9, 2026

Exploit likelihood88.47%

FIRST EPSS · score date Oct 21, 2026 · 99.8th percentile · first observed Oct 21, 2026

SeverityCVSS 10.0

cisco · CVSS 3.1 · first observed Sep 17, 2026 · same-version scores align in this snapshot

Evidence detail

Source limits and decisions

Why each evidence state has this value

Outside this view’s verified evidence

Reason detail begins outside this selected snapshot; the state remains source-bound.

Source comparison

Who said what

CISA KEVOriginal assertion
Exploitation cataloged

Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
CISA-ADPIndependent enrichment
Record text

CISA ADP Vulnrichment

Inspect raw assertion
Field
container
Value
CISA ADP Vulnrichment
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
ciscoOriginal assertion
Record text

Cisco Secure Firewall Management Center Authentication Bypass Remote Code Execution Vulnerability

Inspect raw assertion
Field
container
Value
Cisco Secure Firewall Management Center Authentication Bypass Remote Code Execution Vulnerability
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CVE ProgramDerivative copy
Record text

CVE Program Container

Inspect raw assertion
Field
container
Value
CVE Program Container
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

88.47% probability · 99.77th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.884720000000; percentile 0.997740000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
0Underlying assertions
0Canonical products
0Target assertions
0Constraint assertions

Grouped from 0 configuration nodes in this exact snapshot. Visual grouping is navigational; asset exposure and root cause require cited evidence.

Identity source boundaries
  • Cpe dictionary1,775,266 records · observed through 2026-07-21T06:45:29.809Z27d65b0f-b718-4b4f-bb79-c47c68d09dfa
  • Cpe match643,502 records · observed through 2026-07-21T08:13:17.697Z955dae73-7302-438b-aee1-058d7cc5d48e

1 scope groups

cisco · source assertedCiscoCisco Secure Firewall Management Center (FMC)Direct source scope
Affected: 7.0.0Affected: 7.0.0.1Affected: 7.0.1Affected: 7.1.0Affected: 7.0.1.1Affected: 7.1.0.1Affected: 7.0.2Affected: 7.2.0Affected: 7.0.2.1Affected: 7.0.3Affected: 7.1.0.2Affected: 7.2.0.1Affected: 7.0.4Affected: 7.2.1Affected: 7.0.5Affected: 7.3.0Affected: 7.2.2Affected: 7.3.1Affected: 7.2.3Affected: 7.1.0.3Affected: 7.2.3.1Affected: 7.2.4Affected: 7.0.6Affected: 7.2.4.1Affected: 7.2.5Affected: 7.3.1.1Affected: 7.4.0Affected: 7.0.6.1Affected: 7.2.5.1Affected: 7.4.1Affected: 7.2.6Affected: 7.4.1.1Affected: 7.0.6.2Affected: 7.2.7Affected: 7.2.5.2Affected: 7.3.1.2Affected: 7.2.8Affected: 7.6.0Affected: 7.4.2Affected: 7.2.8.1Affected: 7.0.6.3Affected: 7.4.2.1Affected: 7.2.9Affected: 7.0.7Affected: 7.7.0Affected: 7.4.2.2Affected: 7.2.10Affected: 7.6.1Affected: 7.4.2.3Affected: 7.0.8Affected: 7.6.2Affected: 7.7.10Affected: 7.2.10.1Affected: 7.0.8.1Affected: 7.6.2.1Affected: 7.2.10.2Affected: 7.7.10.1Affected: 7.4.2.4Affected: 7.4.3Affected: 7.6.3Affected: 7.7.11Affected: 7.6.4Affected: 10.0.0Affected: 7.4.4Affected: 7.4.5Affected: 7.0.9Affected: 7.2.11Affected: 7.7.12Affected: 7.6.5Affected: 7.4.6Affected: 10.0.1Affected: 7.4.7
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "7.0.0"}, {"status": "affected", "version": "7.0.0.1"}, {"status": "affected", "version": "7.0.1"}, {"status": "affected", "version": "7.1.0"}, {"status": "affected", "version": "7.0.1.1"}, {"status": "affected", "version": "7.1.0.1"}, {"status": "affected", "version": "7.0.2"}, {"status": "affected", "version": "7.2.0"}, {"status": "affected", "version": "7.0.2.1"}, {"status": "affected", "version": "7.0.3"}, {"status": "affected", "version": "7.1.0.2"}, {"status": "affected", "version": "7.2.0.1"}, {"status": "affected", "version": "7.0.4"}, {"status": "affected", "version": "7.2.1"}, {"status": "affected", "version": "7.0.5"}, {"status": "affected", "version": "7.3.0"}, {"status": "affected", "version": "7.2.2"}, {"status": "affected", "version": "7.3.1"}, {"status": "affected", "version": "7.2.3"}, {"status": "affected", "version": "7.1.0.3"}, {"status": "affected", "version": "7.2.3.1"}, {"status": "affected", "version": "7.2.4"}, {"status": "affected", "version": "7.0.6"}, {"status": "affected", "version": "7.2.4.1"}, {"status": "affected", "version": "7.2.5"}, {"status": "affected", "version": "7.3.1.1"}, {"status": "affected", "version": "7.4.0"}, {"status": "affected", "version": "7.0.6.1"}, {"status": "affected", "version": "7.2.5.1"}, {"status": "affected", "version": "7.4.1"}, {"status": "affected", "version": "7.2.6"}, {"status": "affected", "version": "7.4.1.1"}, {"status": "affected", "version": "7.0.6.2"}, {"status": "affected", "version": "7.2.7"}, {"status": "affected", "version": "7.2.5.2"}, {"status": "affected", "version": "7.3.1.2"}, {"status": "affected", "version": "7.2.8"}, {"status": "affected", "version": "7.6.0"}, {"status": "affected", "version": "7.4.2"}, {"status": "affected", "version": "7.2.8.1"}, {"status": "affected", "version": "7.0.6.3"}, {"status": "affected", "version": "7.4.2.1"}, {"status": "affected", "version": "7.2.9"}, {"status": "affected", "version": "7.0.7"}, {"status": "affected", "version": "7.7.0"}, {"status": "affected", "version": "7.4.2.2"}, {"status": "affected", "version": "7.2.10"}, {"status": "affected", "version": "7.6.1"}, {"status": "affected", "version": "7.4.2.3"}, {"status": "affected", "version": "7.0.8"}, {"status": "affected", "version": "7.6.2"}, {"status": "affected", "version": "7.7.10"}, {"status": "affected", "version": "7.2.10.1"}, {"status": "affected", "version": "7.0.8.1"}, {"status": "affected", "version": "7.6.2.1"}, {"status": "affected", "version": "7.2.10.2"}, {"status": "affected", "version": "7.7.10.1"}, {"status": "affected", "version": "7.4.2.4"}, {"status": "affected", "version": "7.4.3"}, {"status": "affected", "version": "7.6.3"}, {"status": "affected", "version": "7.7.11"}, {"status": "affected", "version": "7.6.4"}, {"status": "affected", "version": "10.0.0"}, {"status": "affected", "version": "7.4.4"}, {"status": "affected", "version": "7.4.5"}, {"status": "affected", "version": "7.0.9"}, {"status": "affected", "version": "7.2.11"}, {"status": "affected", "version": "7.7.12"}, {"status": "affected", "version": "7.6.5"}, {"status": "affected", "version": "7.4.6"}, {"status": "affected", "version": "10.0.1"}, {"status": "affected", "version": "7.4.7"}]

Affected-product evidence

Accepted scope and product mapping

0 canonical links · 0 source-reported links

Applicability remains source-scoped; safety and exposure remain unassessed.

Assessments

CVSS by origin

10.0
psirt@cisco.comCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0
ciscoCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Evidence boundaries

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; remaining scope stays source-scoped.
  • NVD-carried upstream facts remain derivative; independent corroboration requires a separately authored source.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Affected-product evidence remains source-scoped; canonical linkage is required before applicability scoring.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.
  • OSV aggregation and OSV-converted NVD material are not independent corroboration.
  • Red Hat facts are vendor assertions for the exact supplied products.
  • Nonmembership and not-yet-observed states are not proof of safety.