How severe is CVE-2022-0823?

CVE-2022-0823 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2022-0823 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-0823?

CVE-2022-0823 primarily affects Zyxel Gs1200-5 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-2022-0823?

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

When was CVE-2022-0823 published?

CVE-2022-0823 was published on 2022-06-09 and last updated on 2026-06-17.

CVE-2022-0823

CVE-2022-0823 is a medium-severity vulnerability in Zyxel Gs1200-5 Firmware with a CVSS 3.x base score of 6.2. 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-203.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
CVSS v2: 2.1
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-203
Affected product: Zyxel Gs1200-5 Firmware
Published: 2022-06-09
Last modified: 2026-06-17

Description

An improper control of interaction frequency vulnerability in Zyxel GS1200 series switches could allow a local attacker to guess the password by using a timing side-channel attack.

Frequently asked questions

What is CVE-2022-0823?: An improper control of interaction frequency vulnerability in Zyxel GS1200 series switches could allow a local attacker to guess the password by using a timing side-channel attack.
How severe is CVE-2022-0823?: CVE-2022-0823 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2022-0823 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-0823?: CVE-2022-0823 primarily affects Zyxel Gs1200-5 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-2022-0823?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-0823 published?: CVE-2022-0823 was published on 2022-06-09 and last updated on 2026-06-17.

References

https://www.zyxel.com/support/Zyxel-security-advisory-for-password-guessing-vulnerability-of-GS1200-series-switches.shtml

Affected products (4)

cpe:2.3:o:zyxel:gs1200-5_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1200-5hp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1200-8_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1200-8hp_firmware:*:*:*:*:*:*:*:*

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