How severe is CVE-2023-34356?

CVE-2023-34356 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-34356 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-34356?

CVE-2023-34356 affects Peplink Surf Soho Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-34356?

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-2023-34356 published?

CVE-2023-34356 was published on 2023-10-11 and last updated on 2026-06-17.

CVE-2023-34356

CVE-2023-34356 is a high-severity vulnerability in Peplink Surf Soho Firmware with a CVSS 3.x base score of 7.2. 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Peplink Surf Soho Firmware
Published: 2023-10-11
Last modified: 2026-06-17

Description

An OS command injection vulnerability exists in the data.cgi xfer_dns functionality of peplink Surf SOHO HW1 v6.3.5 (in QEMU). A specially crafted HTTP request can lead to command execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Frequently asked questions

What is CVE-2023-34356?: An OS command injection vulnerability exists in the data.cgi xfer_dns functionality of peplink Surf SOHO HW1 v6.3.5 (in QEMU). A specially crafted HTTP request can lead to command execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.
How severe is CVE-2023-34356?: CVE-2023-34356 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-34356 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-34356?: CVE-2023-34356 affects Peplink Surf Soho Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-34356?: 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-2023-34356 published?: CVE-2023-34356 was published on 2023-10-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:peplink:surf_soho_firmware:6.3.5:*:*:*:*:*:*:*

More vulnerabilities in Peplink Surf Soho Firmware

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CVE-2023-35193 — High (CVSS 7.2): An OS command injection vulnerability exists in the api.cgi cmd.mvpn.x509.write functionality of peplink Surf SOHO HW1…
CVE-2023-28381 — High (CVSS 7.2): An OS command injection vulnerability exists in the admin.cgi MVPN_trial_init functionality of peplink Surf SOHO HW1…
CVE-2023-27380 — High (CVSS 7.2): An OS command injection vulnerability exists in the admin.cgi USSD_send functionality of peplink Surf SOHO HW1 v6.3.5…
CVE-2023-34354 — Low (CVSS 3.4): A stored cross-site scripting (XSS) vulnerability exists in the upload_brand.cgi functionality of peplink Surf SOHO HW1…

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