How severe is CVE-2021-34563?

CVE-2021-34563 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-34563 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34563?

CVE-2021-34563 primarily affects Pepperl-fuchs Wha-gw-f2d2-0-as-z2-eth Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-34563?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-34563 published?

CVE-2021-34563 was published on 2021-08-31 and last updated on 2026-06-17.

CVE-2021-34563

CVE-2021-34563 is a low-severity vulnerability in Pepperl-fuchs Wha-gw-f2d2-0-as-z2-eth Firmware with a CVSS 3.x base score of 3.3. 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-1004.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
CVSS v2: 2.1
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1004
Affected product: Pepperl-fuchs Wha-gw-f2d2-0-as-z2-eth Firmware
Published: 2021-08-31
Last modified: 2026-06-17

Description

In PEPPERL+FUCHS WirelessHART-Gateway 3.0.8 and 3.0.9 the HttpOnly attribute is not set on a cookie. This allows the cookie's value to be read or set by client-side JavaScript.

Frequently asked questions

What is CVE-2021-34563?: In PEPPERL+FUCHS WirelessHART-Gateway 3.0.8 and 3.0.9 the HttpOnly attribute is not set on a cookie. This allows the cookie's value to be read or set by client-side JavaScript.
How severe is CVE-2021-34563?: CVE-2021-34563 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-34563 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34563?: CVE-2021-34563 primarily affects Pepperl-fuchs Wha-gw-f2d2-0-as-z2-eth Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-34563?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-34563 published?: CVE-2021-34563 was published on 2021-08-31 and last updated on 2026-06-17.

References

https://cert.vde.com/en-us/advisories/vde-2021-027

Affected products (4)

cpe:2.3:o:pepperl-fuchs:wha-gw-f2d2-0-as-z2-eth_firmware:3.0.8:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:wha-gw-f2d2-0-as-z2-eth_firmware:3.0.9:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:wha-gw-f2d2-0-as-z2-eth.eip_firmware:3.0.8:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:wha-gw-f2d2-0-as-z2-eth.eip_firmware:3.0.9:*:*:*:*:*:*:*

More vulnerabilities in Pepperl-fuchs Wha-gw-f2d2-0-as-z2-eth Firmware

CVE-2021-34565 — Critical (CVSS 9.8): In PEPPERL+FUCHS WirelessHART-Gateway 3.0.7 to 3.0.9 the SSH and telnet services are active with hard-coded credentials.
CVE-2021-34561 — High (CVSS 7.5): In PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.8 serious issue exists, if the application is not externally accessible or…
CVE-2021-33555 — High (CVSS 7.5): In PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.7 the filename parameter is vulnerable to unauthenticated path traversal…
CVE-2021-34564 — Medium (CVSS 5.5): Any cookie-stealing vulnerabilities within the application or browser would enable an attacker to steal the user's…
CVE-2021-34560 — Medium (CVSS 5.5): In PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.9 a form contains a password field with autocomplete enabled. The stored…
CVE-2021-34562 — Medium (CVSS 5.4): In PEPPERL+FUCHS WirelessHART-Gateway 3.0.8 it is possible to inject arbitrary JavaScript into the application's…

All CVEs affecting Pepperl-fuchs Wha-gw-f2d2-0-as-z2-eth Firmware →

Other CWE-1004 vulnerabilities

CVE-2025-26844 — Critical (CVSS 9.8): An issue was discovered in Znuny through 7.1.3. A cookie is set without the HttpOnly flag.
CVE-2026-22081 — High (CVSS 8.8): This vulnerability exists in Tenda wireless routers (300Mbps Wireless Router F3 and N300 Easy Setup Router) due to the…
CVE-2026-42239 — High (CVSS 8.1): Budibase is an open-source low-code platform. Prior to version 3.35.10, the budibase:auth cookie containing the JWT…
CVE-2025-27223 — High (CVSS 7.5): TRUfusion Enterprise through 7.10.4.0 exposes the encrypted COOKIEID as an authentication mechanism for some endpoints…
CVE-2025-24318 — Medium (CVSS 6.8): Cookie policy is observable via built-in browser tools. In the presence of XSS, this could lead to full session…
CVE-2026-0696 — Medium (CVSS 6.5): In ConnectWise PSA versions older than 2026.1, certain session cookies were not set with the HttpOnly attribute. In…

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