CVE-2026-17510Public exploitNetwork attack vector

Process crash via zero-length BMPSTRING attribute

Published Aug 9, 2026 · Updated Aug 9, 2026

NULL pointer dereference in Crypt::OpenSSL::PKCS12 before 1.98 allows attackers to crash processes via a crafted PKCS#12 file. Within print_attribute, a zero-length BMPSTRING causes Renew to free the destination and return NULL, which strlen later dereferences in info_as_hash(). Exploitation requires an application to pass an untrusted PKCS#12 file to info_as_hash(); the result is a deterministic process crash without data disclosure.

CVSS severity7.5
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Crypt::OpenSSL::PKCS12 before 1.98 allows attackers to crash processes via a crafted PKCS#12 file. Within print_attribute, a zero-length BMPSTRING causes Renew to free the destination and return NULL, which strlen later dereferences in info_as_hash(). Exploitation requires an application to pass an untrusted PKCS#12 file to info_as_hash(); the result is a deterministic process crash without data disclosure.

The record

CVE
CVE-2026-17510
Published
Aug 9, 2026
Updated
Aug 9, 2026
Vendor
Jonas Brømsø
Product
Crypt::OpenSSL::PKCS12
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.98

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jonas Brømsø · Crypt::OpenSSL::PKCS12version=0 <1.98

Published CVSS scores

7.5CanonicalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

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Technologies

Your stack

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Your stack

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