🛡️ CVE-2022-21238 — inrouter302-firmware

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity low, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: Required — someone has to click, open or visit something.
• Scope: Changed — a successful attack reaches components beyond the vulnerable one.
• Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
• Integrity impact: Low — limited, and the attacker does not choose what is affected.
• Availability impact: None.

Weakness class

CVE-2022-21238 is classified as CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream…

Affected software

CVE-2022-21238 is recorded against 1 package.

• inrouter302-firmware (fixed in 3.5.37)

Timeline and source

Published on 12 May 2022 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

talosintelligence.com
www.inhandnetworks.com
talosintelligence.com
www.inhandnetworks.com

Other advisories for this package

inrouter302-firmware has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2023-22597 (6.5 Medium, published 12 Jan 2023)
• CVE-2023-22601 (10.0 Critical, published 12 Jan 2023)
• CVE-2023-22600 (10.0 Critical, published 12 Jan 2023)
• CVE-2023-22599 (7.0 High, published 12 Jan 2023)
• CVE-2023-22598 (7.2 High, published 12 Jan 2023)
• CVE-2022-25932 (9.8 Critical, published 9 Nov 2022)
• CVE-2022-21809 (8.1 High, published 12 May 2022)
• CVE-2022-21182 (8.8 High, published 12 May 2022)

Same weakness in other software

These advisories are the same class of weakness (CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)) in other software:

• CVE-2026-54570 (6.9 Medium, published 18 Aug 2026)
• CVE-2026-34497 (5.4 Medium, published 31 Jul 2026)
• CVE-2026-65841 (published 31 Jul 2026)
• CVE-2026-48910 (6.5 Medium, published 30 Jul 2026)
• CVE-2024-58355 (8.9 High, published 23 Jul 2026)
• CVE-2024-58353 (8.9 High, published 23 Jul 2026)
• CVE-2026-54503 (published 23 Jul 2026)
• CVE-2026-32822 (6.1 Medium, published 20 Jul 2026)

Details

Affected Packages

References