7.5

CVE-2021-3053: palo alto networks pan-os

CVSS: 7.5v3.1HighModified
Published 08-09-2021Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2021-3053 is a high (CVSS 7.5) vulnerability in palo alto networks pan-os. EPSS estimates a 1.01% chance of exploitation in the next 30 days, higher than 62.6% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.01%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 08-09-2021
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

Description

An improper handling of exceptional conditions vulnerability exists in the Palo Alto Networks PAN-OS dataplane that enables an unauthenticated network-based attacker to send specifically crafted traffic through the firewall that causes the service to crash. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20; 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. This issue does not affect Prisma Access.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.01%

Chance of exploitation in the next 30 days

Percentile

63%

Versus all other CVEs

30-day change

0.00 pp

From 1.01% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.01%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Palo alto networks1 product
  • pan-os≥ 8.1, < 8.1.20 | ≥ 9.0, < 9.0.14 | ≥ 9.1, < 9.1.9 | ≥ 10.0, < 10.0.5
Paloaltonetworks1 product
  • pan-os≥ 8.1.0, < 8.1.20 | ≥ 9.0.0, < 9.0.14 | ≥ 9.1.0, < 9.1.9 | ≥ 10.0.0, < 10.0.5

2 vendors · 2 products

References

1 links