No exploitation reported

CVE-2015-1789

No exploitation reported by the sources we read.

Published2015-06-12
WeaknessCWE-119

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The X509_cmp_time function in crypto/x509/x509_vfy.c in OpenSSL before 0.9.8zg, 1.0.0 before 1.0.0s, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted length field in ASN1_TIME data, as demonstrated by an attack against a server that supports client authentication with a custom verification callback.

Timeline

dates in UTC

2015-06-1219:59CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2015-1789?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2015-1789?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

OpenSSL

Branch	Affected	Fixed in	Source
0.9	≤ 0.9.8zf	no fix published	NVD
1.0	= 1.0.0	no fix published	NVD
1.0	= 1.0.0a	no fix published	NVD
1.0	= 1.0.0b	no fix published	NVD
1.0	= 1.0.0c	no fix published	NVD
1.0	= 1.0.0d	no fix published	NVD
1.0	= 1.0.0e	no fix published	NVD
1.0	= 1.0.0f	no fix published	NVD
1.0	= 1.0.0g	no fix published	NVD
1.0	= 1.0.0h	no fix published	NVD
1.0	= 1.0.0i	no fix published	NVD
1.0	= 1.0.0j	no fix published	NVD

Oracle sparc-opl service processor

Branch	Affected	Fixed in	Source
1121.x	≤ 1121	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

www.openssl.orgVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.04.3read 2026-10-23
NVDweakness (CWE)CWE-119read 2026-10-23
FIRST EPSSEPSS score75.7 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2015-06-12
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2015-1789?

Is CVE-2015-1789 actively exploited?

Active exploitation of CVE-2015-1789 has not been confirmed. Its EPSS score was 75.7% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2015-1789?

CVE-2015-1789 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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