How severe is CVE-2025-27807?

CVE-2025-27807 has a CVSS 3.x base score of 9.1, 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 none, and availability high.

Is CVE-2025-27807 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27807?

CVE-2025-27807 primarily affects Samsung Exynos 990 Firmware. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-27807?

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.

Does CVE-2025-27807 have an EU (EUVD) identifier?

Yes. CVE-2025-27807 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-0807.

When was CVE-2025-27807 published?

CVE-2025-27807 was published on 2026-01-05 and last updated on 2026-06-17.

CVE-2025-27807

CVE-2025-27807 is a critical-severity vulnerability in Samsung Exynos 990 Firmware with a CVSS 3.x base score of 9.1. 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 9.1)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-0807
Weakness: CWE-787
Affected product: Samsung Exynos 990 Firmware
Published: 2026-01-05
Last modified: 2026-06-17

Description

An issue was discovered in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 9110, W920, W930, W1000, Modem 5123, Modem 5300, Modem 5400. The lack of a length check leads to out-of-bounds writes via malformed NAS packets.

Frequently asked questions

What is CVE-2025-27807?: An issue was discovered in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 9110, W920, W930, W1000, Modem 5123, Modem 5300, Modem 5400. The lack of a length check leads to out-of-bounds writes via malformed NAS packets.
How severe is CVE-2025-27807?: CVE-2025-27807 has a CVSS 3.x base score of 9.1, 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 none, and availability high.
Is CVE-2025-27807 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27807?: CVE-2025-27807 primarily affects Samsung Exynos 990 Firmware. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-27807?: 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.
Does CVE-2025-27807 have an EU (EUVD) identifier?: Yes. CVE-2025-27807 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-0807.
When was CVE-2025-27807 published?: CVE-2025-27807 was published on 2026-01-05 and last updated on 2026-06-17.

References

Affected products (19)

cpe:2.3:o:samsung:exynos_990_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_980_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_850_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_1080_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_2100_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_1280_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_2200_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_1330_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_1380_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_1480_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_1580_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_2400_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_9110_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_w930_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_w920_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:exynos_w1000_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:modem_5123_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:modem_5300_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:samsung:modem_5400_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Samsung Exynos 990 Firmware

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