How severe is CVE-2023-27973?

CVE-2023-27973 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-2023-27973 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-27973?

CVE-2023-27973 primarily affects Hp Laserjet Pro M304-m305 W1a46a Firmware. In total, 38 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-27973?

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-2023-27973 published?

CVE-2023-27973 was published on 2023-04-28 and last updated on 2026-06-25.

CVE-2023-27973

CVE-2023-27973 is a critical-severity vulnerability in Hp Laserjet Pro M304-m305 W1a46a 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-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Hp Laserjet Pro M304-m305 W1a46a Firmware
Published: 2023-04-28
Last modified: 2026-06-25

Description

Certain HP LaserJet Pro print products are potentially vulnerable to Heap Overflow and/or Remote Code Execution.

Frequently asked questions

What is CVE-2023-27973?: Certain HP LaserJet Pro print products are potentially vulnerable to Heap Overflow and/or Remote Code Execution.
How severe is CVE-2023-27973?: CVE-2023-27973 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-2023-27973 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-27973?: CVE-2023-27973 primarily affects Hp Laserjet Pro M304-m305 W1a46a Firmware. In total, 38 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-27973?: 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-2023-27973 published?: CVE-2023-27973 was published on 2023-04-28 and last updated on 2026-06-25.

References

https://support.hp.com/us-en/document/ish_7920137-7920161-16/hpsbpi03841

Affected products (38)

cpe:2.3:o:hp:laserjet_pro_m304-m305_w1a46a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m304-m305_w1a47a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m304-m305_w1a48a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m304-m305_w1a66a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m404-m405_93m22a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m404-m405_w1a51a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m404-m405_w1a52a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m404-m405_w1a53a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m404-m405_w1a56a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m404-m405_w1a57a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m404-m405_w1a58a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m404-m405_w1a59a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m404-m405_w1a60a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m404-m405_w1a63a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m453-m454_w1y40a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m453-m454_w1y41a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m453-m454_w1y43a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m453-m454_w1y44a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m453-m454_w1y45a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m453-m454_w1y46a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_m453-m454_w1y47a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_mfp_m428-m429_f_w1a29a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_mfp_m428-m429_f_w1a30a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_mfp_m428-m429_f_w1a32a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_mfp_m428-m429_f_w1a34a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_mfp_m428-m429_f_w1a35a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_mfp_m428-m429_f_w1a38a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_mfp_m428-m429_w1a28a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_mfp_m428-m429_w1a31a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:laserjet_pro_mfp_m428-m429_w1a33a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:w1a75a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:w1a76a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:w1a77a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:w1a78a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:w1a79a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:w1a80a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:w1a81a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hp:w1a82a_firmware:*:*:*:*:*:*:*:*

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