synced 13 MIN AGO
01 Record

CVE-2020-2040

PAN-OS: Buffer overflow when Captive Portal or Multi-Factor Authentication (MFA) is enabled

CriticalPUBLISHEDCNA: palo_alto
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

02 Description

PAN-OS: Buffer overflow when Captive Portal or Multi-Factor Authentication (MFA) is enabled

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
3.93% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 89.9% of scored records. A rank, not a probability.
NVD base score
9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2020-09-09 16:45Z6 YR AGO
Last updated
2024-09-16 22:40Z2 YR AGO
Reserved
2019-12-04
Assigning CNA
palo_alto
Record state
PUBLISHED
Severity
Critical (CVSS 9.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base
Data version
5.1
Document digest
f90e33589ba5b823be0ab5b57fcfd6e325daea75d39511902a7607768f4aaead

05 Affected products

VendorProductVersionsPlatforms
Palo Alto NetworksPAN-OS8.0.*, 9.0 to < 9.0.9, 9.1 to < 9.1.3, 8.1 to < 8.1.15—

06 References

07 Remediation

This issue is fixed in PAN-OS 8.1.15, PAN-OS 9.0.9, PAN-OS 9.1.3, and all later PAN-OS versions. All Prisma Access services are now upgraded to resolve this issue and are no longer vulnerable. PAN-OS 7.1 and 8.0 are end-of-life and are no longer covered by our Product Security Assurance policies.