critical Known exploitedREV. 01

CVE-2018-13379Fortinet FortiOS — Path Traversal in the Remote-Access Portal

The remote-access portal on Fortinet's firewalls serves files from outside its own directory to unauthenticated callers, and the file attackers reached for held session credentials in plain text.

YOUR NEXT MOVE

Upgrade past 6.0.4, 5.6.7 or 5.4.12, then reset every credential the portal held — patching does not undo what was already taken.

Read the risk

THE VITAL STATS
CVSS score
9.8/ 10
CVSS v3.1
EPSS probability
100%
Likelihood of exploitation
Attack complexity
Low
Conditions needed to exploit
Known exploited
Yes — CISA KEV
CVE published
2019-06-04
Added to KEV
2021-11-03
Exploit published
Not recorded
Confidence
high
Kill chain
credential access
MITRE ATT&CK
T1190, T1083
Severity
critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attacker needsNetwork access to the portal

Behind the card

4 REFERENCES
Field-level provenanceTRACE THE SOURCES +

Which source supports each field, when it was retrieved, and who extracted it.

FieldsSourceRetrievedExtractorConfidence
cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_atnvd.nist.gov2026-08-07scrty-crds-pipeline/0.1high
exploitation.known_exploited, exploitation.kev_addedcisa.gov2026-08-07scrty-crds-pipeline/0.1high
epssapi.first.org2026-08-07scrty-crds-pipeline/0.1high
title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisitesnvd.nist.gov2026-08-07claude-codehigh

Printing history

THE RECORD
  1. r1Initial base card

First printing. This card has not been reprinted since publication.

crds:cve-2018-13379 · CRDS 0.1 · Issued 2026-08-07