How severe is CVE-2022-28940?

CVE-2022-28940 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-28940 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-28940?

CVE-2022-28940 affects H3c Magic R100 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-28940?

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-2022-28940 published?

CVE-2022-28940 was published on 2022-05-04 and last updated on 2026-06-17.

CVE-2022-28940

Q: What is CVE-2022-28940?

In H3C MagicR100 <=V100R005, the / Ajax / ajaxget interface can be accessed without authorization. It sends a large amount of data through ajaxmsg to carry out DOS attack.

CVE-2022-28940 is a high-severity vulnerability in H3c Magic R100 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.1
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: H3c Magic R100 Firmware
Published: 2022-05-04
Last modified: 2026-06-17

Description

In H3C MagicR100 <=V100R005, the / Ajax / ajaxget interface can be accessed without authorization. It sends a large amount of data through ajaxmsg to carry out DOS attack.

Frequently asked questions

What is CVE-2022-28940?: In H3C MagicR100 <=V100R005, the / Ajax / ajaxget interface can be accessed without authorization. It sends a large amount of data through ajaxmsg to carry out DOS attack.
How severe is CVE-2022-28940?: CVE-2022-28940 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-28940 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-28940?: CVE-2022-28940 affects H3c Magic R100 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-28940?: 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-2022-28940 published?: CVE-2022-28940 was published on 2022-05-04 and last updated on 2026-06-17.

References

https://github.com/zhefox/0day/blob/main/%E6%96%B0%E5%8D%8E%E4%B8%89magicR100%E5%AD%98%E5%9C%A8DOS%E6%94%BB%E5%87%BB%E6%BC%8F%E6%B4%9E%E5%88%86%E6%9E%90.md

Affected products (1)

cpe:2.3:o:h3c:magic_r100_firmware:*:*:*:*:*:*:*:*

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