There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL before 1.0.2m and 1.1.0 before 1.1.0g. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen.
CVE-2017-3736
“—” beside the score: it is equal to NVD's CVSS score.
Score 6.5 from GitHub Security Advisory published 2022-05-14. NVD baseline CVSS 6.5; sources differ by 0.0.
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 6.5
- EG Score
- 6.5MEDIUMmedium confidence
- EG Risk
- 45EG Risk 45/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity65% × 45%Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability0% × 15%CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 10%
- EPSS %ILE
- 95th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 10% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
November 2, 2017
Last Modified
June 17, 2026
References (27)
- openssl-security@openssl · CVE Programhttp://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.htmlPatch · Third Party Advisory
- openssl-security@openssl · CVE Programhttp://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.htmlPatch · Third Party Advisory
- openssl-security@openssl · CVE Programhttp://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.htmlPatch · Third Party Advisory
- openssl-security@openssl · CVE Programhttp://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlPatch · Third Party Advisory
- openssl-security@openssl · CVE Programhttp://www.securityfocus.com/bid/101666 (archived copy: the site no longer serves it)Third Party Advisory · VDB Entry
- openssl-security@openssl · CVE Programhttp://www.securitytracker.com/id/1039727Third Party Advisory · VDB Entry
- openssl-security@openssl · CVE Programhttps://access.redhat.com/errata/RHSA-2018:0998Third Party Advisory
- openssl-security@openssl · CVE Programhttps://access.redhat.com/errata/RHSA-2018:2185Third Party Advisory
- openssl-security@openssl · CVE Programhttps://access.redhat.com/errata/RHSA-2018:2186Third Party Advisory
- openssl-security@openssl · CVE Programhttps://access.redhat.com/errata/RHSA-2018:2187Third Party Advisory
- openssl-security@openssl · CVE Programhttps://access.redhat.com/errata/RHSA-2018:2568Third Party Advisory
- openssl-security@openssl · CVE Programhttps://access.redhat.com/errata/RHSA-2018:2575Third Party Advisory
- openssl-security@openssl · CVE Programhttps://access.redhat.com/errata/RHSA-2018:2713Third Party Advisory
- openssl-security@openssl · CVE Programhttps://github.com/openssl/openssl/commit/4443cf7aa0099e5ce615c18cee249fff77fb0871Third Party Advisory
- openssl-security@openssl · CVE Programhttps://security.FreeBSD.org/advisories/FreeBSD-SA-17:11.openssl.ascThird Party Advisory
15 of 27 shown · show the other 12
- openssl-security@openssl · CVE Programhttps://security.gentoo.org/glsa/201712-03Third Party Advisory
- openssl-security@openssl · CVE Programhttps://security.netapp.com/advisory/ntap-20171107-0002/Issue Tracking · Third Party Advisory
- openssl-security@openssl · CVE Programhttps://security.netapp.com/advisory/ntap-20180117-0002/Third Party Advisory
- openssl-security@openssl · CVE Programhttps://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03881en_usThird Party Advisory
- openssl-security@openssl · CVE Programhttps://www.debian.org/security/2017/dsa-4017Issue Tracking · Third Party Advisory
- openssl-security@openssl · CVE Programhttps://www.debian.org/security/2017/dsa-4018Issue Tracking · Third Party Advisory
- openssl-security@openssl · CVE Programhttps://www.openssl.org/news/secadv/20171102.txtIssue Tracking · Vendor Advisory
- openssl-security@openssl · CVE Programhttps://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- openssl-security@openssl · CVE Programhttps://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
- openssl-security@openssl · CVE Programhttps://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- openssl-security@openssl · CVE Programhttps://www.tenable.com/security/tns-2017-14Issue Tracking · Third Party Advisory
- openssl-security@openssl · CVE Programhttps://www.tenable.com/security/tns-2017-15Third Party Advisory
Vendor Advisories for CVE-2017-3736(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(7)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | openssl (1.0.1f-1ubuntu2.23) @ trusty | 2026-05-22 | ubuntu |
| redhat | java-1.8.0-ibm-1:1.8.0.5.20-1jpp.1.el6_10 | 2018-09-17 | redhat |
| redhat | java-1.8.0-ibm-1:1.8.0.5.20-1jpp.1.el7 | 2018-08-27 | redhat |
| redhat | jbcs-httpd24-openssl-1:1.0.2n-11.jbcs.el7 | 2018-07-12 | redhat |
| redhat | openssl | 2018-07-12 | redhat |
| redhat | jbcs-httpd24-openssl-1:1.0.2n-11.jbcs.el6 | 2018-07-12 | redhat |
| redhat | openssl-1:1.0.2k-12.el7 | 2018-04-10 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(11 across 11 ecosystems)
Alpine:v3.3(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Alpine:v3.4(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Alpine:v3.5(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Alpine:v3.6(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Alpine:v3.7(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Alpine:v3.8(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Debian:9(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl1.0 | 1.0.2l-2 |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(8)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
- Red HatRHSA-2018:0998MODERATE2017-11-02
RHSA-2018:0998 — Moderate
- Red HatRHSA-2018:2185MODERATE2017-11-02
RHSA-2018:2185 — Moderate
- Red HatRHSA-2018:2186MODERATE2017-11-02
RHSA-2018:2186 — Moderate
- Red HatRHSA-2018:2187MODERATE2017-11-02
RHSA-2018:2187 — Moderate
- Red HatRHSA-2018:2568MODERATE2017-11-02
RHSA-2018:2568 — Moderate
- Red HatRHSA-2018:2575MODERATE2017-11-02
RHSA-2018:2575 — Moderate
- Red HatRHSA-2018:2713MODERATE2017-11-02
RHSA-2018:2713 — Moderate
- UbuntuUSN-3475-1MEDIUM
OpenSSL vulnerabilities
Data Freshness Timeline
(refreshed 7× in last 7d / 29× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 89 of 159 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 11 repeat rows among the latest 100 are merged into the row they repeat. The 70 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-23 16:26 UTCEPSS rescoreEPSS 10% · 95th percentile
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- 2026-10-18 10:31 UTCEG score recompute
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- 2026-10-12 20:28 UTCEG score recompute
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- 2026-10-07 21:24 UTCOSV refresh
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- 2026-09-28 13:45 UTCEPSS rescoreEPSS 10% · 95th percentile
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- 2026-09-18 19:22 UTCEPSS rescoreEPSS 10% · 95th percentile
- 2026-09-18 03:36 UTCOSV refresh
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- 2026-09-05 15:23 UTCEPSS rescoreEPSS 9.6% · 95th percentile
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- 2026-08-30 04:18 UTCOSV refresh
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- 2026-07-23 14:15 UTCEPSS rescoreEPSS 10% · 95th percentile
- 2026-07-23 01:29 UTCEG score recompute
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- 2026-07-22 14:04 UTCEPSS rescoreEPSS 10% · 95th percentile
- 2026-07-21 15:21 UTCEPSS rescoreEPSS 10% · 95th percentile
- 2026-07-20 17:04 UTCEPSS rescoreEPSS 10% · 95th percentile
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Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:9:openssl1.0 · Alpine:v3.5:openssl
- CVE-2017-3737NVD 5.9EG 8.6EPSS p100HIGH
- CVE-2018-0732NVD 7.5EG 8.0EPSS p99HIGH
- CVE-2018-0739EG 6.5EPSS p97MEDIUM
- CVE-2018-0734EG 5.9EPSS p96MEDIUM
- CVE-2018-0737EG 5.9EPSS p96MEDIUM
- CVE-2017-3738EG 5.9EPSS p96MEDIUM
- CVE-2017-3735EG 5.3EPSS p98MEDIUM
- CVE-2018-5407EG 4.7MEDIUM
- CVE-2016-6303EG 9.8EPSS p98CRITICAL
- CVE-2016-2182EG 9.8EPSS p99CRITICAL
Same vendor
10 shownredhat:RHSA-2018:2185 · redhat:RHSA-2018:0998 · redhat:RHSA-2018:2568
- CVE-2017-3732EG 5.9EPSS p97MEDIUM
- CVE-2017-3737NVD 5.9EG 8.6EPSS p100HIGH
- CVE-2017-3738EG 5.9EPSS p96MEDIUM
- CVE-2016-2182EG 9.8EPSS p99CRITICAL
- CVE-2016-0705EG 9.8EPSS p98CRITICAL
- CVE-2017-3731NVD 7.5EG 8.2EPSS p99HIGH
- CVE-2018-12539EG 7.8HIGH
- CVE-2018-1517NVD 5.9EG 7.5EPSS p90HIGH
- CVE-2016-6302EG 7.5EPSS p98HIGH
- CVE-2018-1656EG 7.4EPSS p91HIGH
Frequently asked(5)
What is CVE-2017-3736?
When was CVE-2017-3736 made public?
Is CVE-2017-3736 actively exploited?
What is the CVSS score of CVE-2017-3736?
How do I remediate CVE-2017-3736?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2017-3736
Is Your Infrastructure Affected by CVE-2017-3736?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.