CVE-2022-22241: Junos OS: Vulnerability in J-Web may allow deserialization without authentication

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of 29 Oct 2026.

VulnCheck KEV lists it since 18 Oct 2022. It cites 1 public report, the first from 18 Oct 2022.

• ess.coalitioninc.com

How likely is exploitation in the next 30 days?

1.3%

EPSS score, percentile 70.3 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?

8.1 High

CVSS v3.1 base score, given by the CNA

What should I do?

The following software releases have been updated to resolve this specific issue: 19.1R3-S9, 19.2R3-S6, 19.3R3-S7, 19.4R2-S7, 19.4R3-S9, 20.1R3-S5, 20.2R3-S5, 20.3R3-S5 … Full textSolution from the CVE record.

CISA has set no required action, because the vulnerability is not in KEV.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

• before 19.1R3-S9
• from 19.2 to before 19.2R3-S6
• from 19.3 to before 19.3R3-S7
• from 19.4 to before 19.4R2-S7, 19.4R3-S9
• from 20.1 to before 20.1R3-S5
• from 20.2 to before 20.2R3-S5

and 6 more in the table below

Versions by product

Source: CISA KEV 2026.10.29, as of 29 Oct 2026; VulnCheck KEV, as of 30 Oct 2026; FIRST EPSS, as of 30 Oct 2026; CVE List, as of 30 Oct 2026. About the data.

Description

Junos OS: Vulnerability in J-Web may allow deserialization without authentication

An Improper Input Validation vulnerability in the J-Web component of Juniper Networks Junos OS may allow an unauthenticated attacker to access data without proper authorization. Utilizing a crafted POST request, deserialization may occur which could lead to unauthorized local file access or the ability to execute arbitrary commands. This issue affects Juniper Networks Junos OS: all versions prior to 19.1R3-S9; 19.2 versions prior to 19.2R3-S6; 19.3 versions prior to 19.3R3-S7; 19.4 versions prior to 19.4R2-S7, 19.4R3-S9; 20.1 versions prior to 20.1R3-S5; 20.2 versions prior to 20.2R3-S5; 20.3 versions prior to 20.3R3-S5; 20.4 versions prior to 20.4R3-S4; 21.1 versions prior to 21.1R3-S2; 21.2 versions prior to 21.2R3-S1; 21.3 versions prior to 21.3R2-S2, 21.3R3; 21.4 versions prior to 21.4R1-S2, 21.4R2-S1, 21.4R3; 22.1 versions prior to 22.1R1-S1, 22.1R2.

Source: CVE List, as of 30 Oct 2026. About the data.

What to do

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Solution (from the CVE record)

The following software releases have been updated to resolve this specific issue: 19.1R3-S9, 19.2R3-S6, 19.3R3-S7, 19.4R2-S7, 19.4R3-S9, 20.1R3-S5, 20.2R3-S5, 20.3R3-S5, 20.4R3-S4, 21.1R3-S2, 21.2R3-S1, 21.3R2-S2, 21.3R3, 21.4R1-S2, 21.4R2-S1, 21.4R3, 22.1R1-S1, 22.1R2, 22.2R1, and all subsequent releases.

Workaround (from the CVE record)

Disable J-Web, or limit access to only trusted hosts.

This summary is based on the CVE record as of 30 Oct 2026. Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Source: CVE List, as of 30 Oct 2026. About the data.

Timeline

Known exploited Juniper vulnerabilities

• CVE-2015-7755: Juniper ScreenOS Improper Authentication Vulnerability (added 2 Oct 2025)
• CVE-2025-21590: Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability (added 13 Mar 2025)
• CVE-2023-36844: Juniper Junos OS EX Series PHP External Variable Modification Vulnerability (added 13 Nov 2023)
• CVE-2023-36845: Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability (added 13 Nov 2023)
• CVE-2023-36846: Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability (added 13 Nov 2023)