CVE-2025-26780: An issue was discovered in L2 in Samsung Mobile Processor and Modem Exynos 2400 and Modem 5400

This month

HIGH 7.5REMOTEMITIGATEMITIGATE

CVE-2025-26780 is a high-severity flaw (CVSS 7.5) affecting exynos 2400 firmware, modem 5400 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in L2 in Samsung Mobile Processor and Modem Exynos 2400 and Modem 5400. The lack of a length check leads to a Denial of Service via a malformed PDCP packet.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-20
Published	2025-07-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: samsung

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-07-07 16:15 UTCPublished CVE record published
2026-06-17 09:02 UTCUpdated Record last modified

samsung exynos 2400 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

samsung modem 5400 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-26780?

exynos 2400 firmware: mitigate or apply the listed mitigation; modem 5400 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-26780 being exploited?

CVE-2025-26780 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-26780 affect?

CVE-2025-26780 affects exynos 2400 firmware, modem 5400 firmware. Severity is high (CVSS 7.5). An issue was discovered in L2 in Samsung Mobile Processor and Modem Exynos 2400 and Modem 5400. The lack of a length check leads to a Denial of Service via a malformed PDCP packet.

How urgent is CVE-2025-26780?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

Software pages

Samsung vulnerabilities

Related CVEs

CVE-2025-52910 CRITICAL 9.8 MITIGATE MITIGATE An issue was discovered in the GPU in Samsung Mobile Processor and Wearable Processor Exynos 1280, 2200, 1330,
CVE-2025-54335 MEDIUM 6.5 MITIGATE MITIGATE An issue was discovered in the GPU driver in Samsung Mobile Processor Exynos 1480, 2400, 1580, 2500
CVE-2025-53966 HIGH 8.4 MITIGATE MITIGATE An issue was discovered in Samsung Mobile Processor Exynos 1380, 1480, 2400, and 1580
CVE-2025-52516 MEDIUM 6.2 MITIGATE MITIGATE An issue was discovered in the Camera in Samsung Mobile Processor and Wearable Processor Exynos 1330, 1380, 14
CVE-2025-62817 HIGH 7.5 MITIGATE MITIGATE An issue was discovered in Samsung Mobile Processor Exynos 1280, 2200, 1380, 1480, 2400, 1580, and 2500

References

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