CVE-2021-3048 json
PAN-OS: Invalid URLs in an External Dynamic List (EDL) can Lead to Firewall Outage
published 2021-08-11 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26400
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 58%
- public exploits
- 0
- none known
Summary
Certain invalid URL entries contained in an External Dynamic List (EDL) cause the Device Server daemon (devsrvr) to stop responding. This condition causes subsequent commits on the firewall to fail and prevents administrators from performing commits and configuration changes even though the firewall remains otherwise functional. If the firewall then restarts, it results in a denial-of-service (DoS) condition and the firewall stops processing traffic. This issue impacts: PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.9; PAN-OS 10.0 versions earlier than PAN-OS 10.0.5. PAN-OS 8.1 and PAN-OS 10.1 versions are not impacted.
Patch / fix
- Palo Alto Networks PAN-OS 9.0.14, 9.1.9, 10.0.5
Exploit prediction
0.84% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
Affected products
- Palo Alto Networks PAN-OS
Classification
- Weakness
-
- CWE-20 Improper Input Validation
- Technology feeds
References
-
security.paloaltonetworks.com
/CVE-2021-3048
vendor-advisory
-
security.paloaltonetworks.com
/CVE-2020-3048
broken-link
Sources
- CVE List CVE-2021-3048
- NVD CVE-2021-3048
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