5.3

CVE-2020-1999: palo alto networks pan-os

CVSS: 5.3v3.1MediumModified
Published 12-11-2020Last modified 17-09-2024
Open JSON

Vulnerability summary

CVE-2020-1999 is a medium (CVSS 5.3) vulnerability in palo alto networks pan-os. EPSS estimates a 1.34% chance of exploitation in the next 30 days, higher than 70.9% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.34%
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. 12-11-2020
    PublishedVulnerability first disclosed.
  2. 17-09-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability exists in the Palo Alto Network PAN-OS signature-based threat detection engine that allows an attacker to communicate with devices in the network in a way that is not analyzed for threats by sending data through specifically crafted TCP packets. This technique evades signature-based threat detection. This issue impacts: PAN-OS 8.1 versions earlier than 8.1.17; PAN-OS 9.0 versions earlier than 9.0.11; PAN-OS 9.1 versions earlier than 9.1.5; All versions of PAN-OS 7.1 and PAN-OS 8.0.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.34%

Chance of exploitation in the next 30 days

Percentile

71%

Versus all other CVEs

30-day change

0.00 pp

From 1.34% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.34%

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-osEOL≥ 7.1.0, < 7.2.0 | ≥ 8.0.0, < 8.1.0 | ≥ 8.1, < 8.1.17 | ≥ 9.0, < 9.0.11 | ≥ 9.1, < 9.1.5
Paloaltonetworks1 product
  • pan-os≥ 7.1.0, ≤ 7.1.26 | ≥ 8.0.0, ≤ 8.0.20 | ≥ 8.1.0, < 8.1.17 | ≥ 9.0.0, < 9.0.11 | ≥ 9.1.0, < 9.1.5

2 vendors · 2 products

References

1 links