Is CVE-2026-40339 actively exploited?

No active exploitation of CVE-2026-40339 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40339 be exploited remotely?

No. CVE-2026-40339 requires physical access to exploit.

What is the CVSS score of CVE-2026-40339?

CVE-2026-40339 has a CVSS score of 5.2 (MEDIUM).

HOME VULNERABILITIESCVE-2026-40339

MEDIUM

CVE-2026-40339

CWE-125Published: April 18, 2026· Updated: Apr 20, 2026

5.2

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:0.5th

Official Description

libgphoto2 is a camera access and control library. Versions up to and including 2.5.33 have an out-of-bounds read in `ptp_unpack_Sony_DPD()` in `camlibs/ptp2/ptp-pack.c` (line 842). The function reads the FormFlag byte via `dtoh8o(data, *poffset)` without a prior bounds check. The standard `ptp_unpack_DPD()` at lines 686–687 correctly validates `*offset + sizeof(uint8_t) > dpdlen` before this same read, but the Sony variant omits this check entirely. Commit 09f8a940b1e418b5693f5c11e3016a1ad2cea62d fixes the issue.

NVD Source

Technical Analysis

CVE-2026-40339 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.2.