How severe is CVE-2021-42540?

CVE-2021-42540 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-42540 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42540?

CVE-2021-42540 primarily affects Emerson Wireless 1410 Gateway Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-42540?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-42540 published?

CVE-2021-42540 was published on 2021-10-22 and last updated on 2026-06-17.

CVE-2021-42540

CVE-2021-42540 is a high-severity vulnerability in Emerson Wireless 1410 Gateway Firmware with a CVSS 3.x base score of 8.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-123.

Key facts

Severity: High (CVSS 3.x base score 8.0)
CVSS v2: 6.5
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-123
Affected product: Emerson Wireless 1410 Gateway Firmware
Published: 2021-10-22
Last modified: 2026-06-17

Description

The affected product is vulnerable to a unsanitized extract folder for system configuration. A low-privileged user can leverage this logic to overwrite the settings and other key functionality.

Frequently asked questions

What is CVE-2021-42540?: The affected product is vulnerable to a unsanitized extract folder for system configuration. A low-privileged user can leverage this logic to overwrite the settings and other key functionality.
How severe is CVE-2021-42540?: CVE-2021-42540 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-42540 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42540?: CVE-2021-42540 primarily affects Emerson Wireless 1410 Gateway Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-42540?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-42540 published?: CVE-2021-42540 was published on 2021-10-22 and last updated on 2026-06-17.

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-278-02

Affected products (3)

cpe:2.3:o:emerson:wireless_1410_gateway_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:emerson:wireless_1410d_gateway_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:emerson:wireless_1420_gateway_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Emerson Wireless 1410 Gateway Firmware

CVE-2020-12030 — Critical (CVSS 10.0): There is a flaw in the code used to configure the internal gateway firewall when the gateway's VLAN feature is enabled.…
CVE-2021-42542 — High (CVSS 8.0): The affected product is vulnerable to directory traversal due to mishandling of provided backup folder structure.
CVE-2021-42539 — High (CVSS 8.0): The affected product is vulnerable to a missing permission validation on system backup restore, which could lead to…
CVE-2021-42538 — High (CVSS 8.0): The affected product is vulnerable to a parameter injection via passphrase, which enables the attacker to supply…
CVE-2021-42536 — High (CVSS 8.0): The affected product is vulnerable to a disclosure of peer username and password by allowing all users access to read…
CVE-2021-38485 — High (CVSS 8.0): The affected product is vulnerable to improper input validation in the restore file. This enables an attacker to…

All CVEs affecting Emerson Wireless 1410 Gateway Firmware →

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CVE-2026-43284 — High (CVSS 8.8): In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb…

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