CVE-2021-29457

Status: ModifiedHigh (7.8)—

Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. A heap buffer overflow was found in Exiv2 versions v0.27.3 and earlier. The heap overflow is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to gain code execution, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when _writing_ the metadata, which is a less frequently used Exiv2 operation than _reading_ the metadata. For example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such as `insert`. The bug is fixed in version v0.27.4.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base score: 7.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 2.15%
Percentile among all scored CVEs: 82
Score date: 10/12/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (3)

Debian — Debian Linux Exiv2 — Exiv2 Fedoraproject — Fedora

CWEs

CWE-122

References

Raw JSON (NVD)

Show

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      "value": "Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. A heap buffer overflow was found in Exiv2 versions v0.27.3 and earlier. The heap overflow is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to gain code execution, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when _writing_ the metadata, which is a less frequently used Exiv2 operation than _reading_ the metadata. For example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such as `insert`. The bug is fixed in version v0.27.4."
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      "value": "Exiv2 es una utilidad de línea de comandos y una biblioteca C++ para leer, escribir, eliminar y modificar los metadatos de archivos de imagen.&#xa0;Se encontró un desbordamiento del búfer de pila en Exiv2 versiones v0.27.3 y anteriores.&#xa0;El desbordamiento de la pila es desencadenado cuando es usado Exiv2 para escribir metadatos en un archivo de imagen diseñado.&#xa0;Un atacante podría explotar potencialmente la vulnerabilidad para obtener una ejecución de código, si puede engañar a la víctima para que ejecute Exiv2 en un archivo de imagen diseñado.&#xa0;Note que este bug solo es desencadenado cuando _writing_ los metadatos, que es una operación Exiv2 que es usada con menos frecuencia que _reading_ los metadatos.&#xa0;Por ejemplo, para desencadenar el bug en la aplicación de línea de comandos Exiv2, debe agregar un argumento de línea de comando adicional como \"insert\".&#xa0;El bug es corregido en versión v0.27.4"
    }
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  "lastModified": "2026-06-17T03:47:40.823",
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