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01 Record

CVE-2021-3048

PAN-OS: Invalid URLs in an External Dynamic List (EDL) can Lead to Firewall Outage

MediumPUBLISHEDCNA: palo_alto
CNA base score5.9 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

02 Description

PAN-OS: Invalid URLs in an External Dynamic List (EDL) can Lead to Firewall Outage

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
0.84% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 57.5% of scored records. A rank, not a probability.
NVD base score
5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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
2021-08-11 17:10Z5 YR AGO
Last updated
2024-09-16 19:31Z2 YR AGO
Reserved
2021-01-06
Assigning CNA
palo_alto
Record state
PUBLISHED
Severity
Medium (CVSS 5.9)
CNA CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-20Improper Input ValidationClass
Data version
5.1
Document digest
448b2bad493167548483f029dbdd40e62ad586fbc8440c79f1d5a087c8851304

05 Affected products

VendorProductVersionsPlatforms
Palo Alto NetworksPAN-OS9.0 to < 9.0.14, 9.1 to < 9.1.9, 10.0 to < 10.0.5—

06 References

07 Remediation

This issue is fixed in PAN-OS 9.0.14, PAN-OS 9.1.9, PAN-OS 10.0.5, and all later PAN-OS versions. If a firewall encounters this problem, you will require TAC assistance to make the firewall operational again.