How severe is CVE-2026-25271?

CVE-2026-25271 has a CVSS score of 7.8/10, rated HIGH. Immediate patching is strongly recommended.

Which products are affected by CVE-2026-25271?

CVE-2026-25271 affects the following products: qualcomm cologne firmware, qualcomm fastconnect 6900 firmware, qualcomm fastconnect 7800 firmware, qualcomm iqx5121 firmware, qualcomm iqx7181 firmware, qualcomm qca0000 firmware, qualcomm sc8380xp firmware, qualcomm wcd9378c firmware, and 13 more.

How do I patch CVE-2026-25271?

No patch has shipped for CVE-2026-25271 yet — track the qualcomm cologne firmware advisory for a fixed release and apply the workarounds below in the meantime.

How do I detect CVE-2026-25271 across my infrastructure?

Inventory every qualcomm cologne firmware deployment and check each version against the affected-products list above.

How do I mitigate CVE-2026-25271 if there is no patch (or I can't update yet)?

Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Is CVE-2026-25271 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-25271 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-25271?

CVE-2026-25271 has an EPSS (Exploit Prediction Scoring System) score of 0.1%, placing it in the 0th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-25271?

CVE-2026-25271 is classified as CWE-367 (CWE-367). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2026-25271?

CVE-2026-25271 affects qualcomm cologne firmware; qualcomm fastconnect 6900 firmware; qualcomm fastconnect 7800 firmware; qualcomm iqx5121 firmware, and 17 more product(s). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2026-25271 published, and has it been updated?

CVE-2026-25271 was published on July 6, 2026 and was last updated on July 7, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🛡️

Not in CISA KEV

HIGH severity

CVE-2026-25271 — Cologne Firmware

HIGH

CVE-2026-25271 is a high-severity (CVSS 7.8) CWE-367 vulnerability in qualcomm cologne firmware. No vendor fix is recorded yet; mitigation options are listed below.

Memory Corruption when processing asynchronous input parameters due to improper handling of modified values between check and use.

Published

Jul 6, 2026

Updated

Jul 7, 2026

Affected

21 products

Patched

See advisory

Exploits

None indexed

Exploitation data as of Sep 30, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

A successful exploit gives an attacker total control of the affected component, not partial access.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-25271.

EPSS Exploitation Probability

via FIRST.org ↗

0.1%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs0th percentile — riskier than 0% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2026-25271 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 380,526 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Description

Memory Corruption when processing asynchronous input parameters due to improper handling of modified values between check and use.

Affected Products

21 products · 21 configurations

cologne firmwarequalcomm

all

fastconnect 6900 firmwarequalcomm

all

fastconnect 7800 firmwarequalcomm

all

iqx5121 firmwarequalcomm

all

iqx7181 firmwarequalcomm

all

qca0000 firmwarequalcomm

all

Detection & mitigation playbook

Vendor / appliance

Detect
Inventory every qualcomm cologne firmware deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2026-25271 yet — track the qualcomm cologne firmware advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Frequently Asked Questions

Memory Corruption when processing asynchronous input parameters due to improper handling of modified values between check and use.

O3 Security · Runtime Protection

Is CVE-2026-25271 being exploited in your environment?

Detect and block the exploit chain at execution, on systems you cannot patch yet.

Protect my workloads How runtime protection works

CVE-2026-25271 — Cologne Firmware

Exploitation Status

No confirmed exploitation observed yet

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Description

Affected Products

Detection & mitigation playbook

Detect

Remediation status

Mitigate without a patch

Frequently Asked Questions

Is CVE-2026-25271 being exploited in your environment?