# CVE-2026-25283: Qualcomm buffer overflow in external data handling

Source: https://junglewise.ai/threats/cve-2026-25283-qualcomm-buffer-overflow-in-external-data-handling  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-17. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-25283 · Severity: high · CVSS 8.8 · Published 2026-09-17

A memory corruption vulnerability exists in Qualcomm components when handling unverified data from external sources. Unvalidated input exceeding allocated buffer sizes can corrupt memory, potentially allowing attackers to crash the system or execute arbitrary code, impacting device stability and security.

Technologies: [Qualcomm Cologne](https://junglewise.ai/threats/technologies/cologne), [Qualcomm Cologne Firmware](https://junglewise.ai/threats/technologies/cologne-firmware), [Qualcomm Fastconnect 7800](https://junglewise.ai/threats/technologies/fastconnect-7800), [Qualcomm Fastconnect 7800 Firmware](https://junglewise.ai/threats/technologies/fastconnect-7800-firmware), [Qualcomm Snapdragon](https://junglewise.ai/threats/technologies/snapdragon), [Qualcomm Snapdragon X2 Elite](https://junglewise.ai/threats/technologies/snapdragon-x2-elite), [Qualcomm Snapdragon X2 Elite Firmware](https://junglewise.ai/threats/technologies/snapdragon-x2-elite-firmware), [Qualcomm Wcd9378c](https://junglewise.ai/threats/technologies/wcd9378c), [Qualcomm Wcd9378c Firmware](https://junglewise.ai/threats/technologies/wcd9378c-firmware), [Qualcomm Wsa8840](https://junglewise.ai/threats/technologies/wsa8840), [Qualcomm Wsa8840 Firmware](https://junglewise.ai/threats/technologies/wsa8840-firmware), [Qualcomm Wsa8845](https://junglewise.ai/threats/technologies/wsa8845), [Qualcomm Wsa8845 Firmware](https://junglewise.ai/threats/technologies/wsa8845-firmware), [Qualcomm Wsa8845h](https://junglewise.ai/threats/technologies/wsa8845h), [Qualcomm Wsa8845h Firmware](https://junglewise.ai/threats/technologies/wsa8845h-firmware). Vendors: [Qualcomm](https://junglewise.ai/threats/vendors/qualcomm).

## Quick answers

**Is CVE-2026-25283 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-25283 being exploited in the wild.

**How severe is CVE-2026-25283?** High severity, with a CVSS score of 8.8, published 17 September 2026.

**Which products and versions are affected?** Qualcomm Snapdragon <UNKNOWN>.

**Is there a fix for CVE-2026-25283?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-25283 attacked?** It is attacked over the network or with local access, in device firmware.

**Am I affected by CVE-2026-25283?** Check whether you run Qualcomm Cologne, Qualcomm Cologne Firmware, Qualcomm Fastconnect 7800 or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is a classic buffer overflow vulnerability in Qualcomm firmware or components that processes external data without proper size validation. When copying data from an untrusted external source, the code fails to verify the input size against the allocated buffer, leading to a heap or stack overflow. The vulnerability requires network or local access to send malformed data to the affected component. Exploitation can result in denial of service (crash) or potentially remote code execution depending on the memory layout and exploitation technique used.

## Affected products

- Qualcomm Snapdragon <UNKNOWN>

## Timeline

- 2026-09-17: disclosed

## References

- [https://docs.qualcomm.com/product/publicresources/securitybulletin/september-2026-bulletin.html](https://docs.qualcomm.com/product/publicresources/securitybulletin/september-2026-bulletin.html)

## Related threats

- [Qualcomm transient denial of service while parsing frame during channel usage](https://junglewise.ai/threats/cve-2026-25294-qualcomm-transient-denial-of-service-while-parsing-frame-during)
- [Qualcomm component memory corruption in buffer validation](https://junglewise.ai/threats/cve-2026-25290-qualcomm-component-memory-corruption-in-buffer-validation)
- [Qualcomm component use-after-free information disclosure](https://junglewise.ai/threats/cve-2026-25284-qualcomm-component-use-after-free-information-disclosure)
- [Qualcomm component out-of-bounds memory access in data processing](https://junglewise.ai/threats/cve-2026-25282-qualcomm-component-out-of-bounds-memory-access-in-data-processing)
- [Qualcomm component memory corruption in escape handling](https://junglewise.ai/threats/cve-2026-25280-qualcomm-component-memory-corruption-in-escape-handling)