How severe is CVE-2023-25770?

CVE-2023-25770 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-25770 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-25770?

CVE-2023-25770 affects Honeywell C300 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-25770?

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

When was CVE-2023-25770 published?

CVE-2023-25770 was published on 2023-07-13 and last updated on 2026-06-17.

CVE-2023-25770

CVE-2023-25770 is a critical-severity vulnerability in Honeywell C300 Firmware with a CVSS 3.x base score of 9.8. 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Honeywell C300 Firmware
Published: 2023-07-13
Last modified: 2026-06-17

Description

Controller DoS may occur due to buffer overflow when an error is generated in response to a specially crafted message. See Honeywell Security Notification for recommendations on upgrading and versioning.

Frequently asked questions

What is CVE-2023-25770?: Controller DoS may occur due to buffer overflow when an error is generated in response to a specially crafted message. See Honeywell Security Notification for recommendations on upgrading and versioning.
How severe is CVE-2023-25770?: CVE-2023-25770 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-25770 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-25770?: CVE-2023-25770 affects Honeywell C300 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-25770?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-25770 published?: CVE-2023-25770 was published on 2023-07-13 and last updated on 2026-06-17.

References

https://process.honeywell.com

Affected products (1)

cpe:2.3:o:honeywell:c300_firmware:*:*:*:*:*:*:*:*

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