CVE-2015-3193

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 7.5 from GitHub Security Advisory published 2022-05-17. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 25%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

The Montgomery squaring implementation in crypto/bn/asm/x86_64-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x86_64 platform, as used by the BN_mod_exp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key information via an attack against use of a (1) Diffie-Hellman (DH) or (2) Diffie-Hellman Ephemeral (DHE) ciphersuite.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
50
EG Risk 50/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
The EG Score, 7.5 of 10.
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
25%
EPSS %ILE
97th
KEV
Not listed

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

December 6, 2015

Last Modified

May 6, 2026

References (22)

15 of 22 shown · show the other 7

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibssl1.0.0 (1.0.2d-0ubuntu1.2) @ wily2026-05-22ubuntu

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
openssl—
  • every version up to 1.0.2e-1: fixed in 1.0.2e-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
openssl—
  • every version up to 1.0.2e-1: fixed in 1.0.2e-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
openssl—
  • every version up to 1.0.2e-1: fixed in 1.0.2e-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
openssl—
  • every version up to 1.0.2e-1: fixed in 1.0.2e-1
—

All Vendor Advisories

(1)

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.

Data Freshness Timeline

(refreshed 9× in last 7d / 21× 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 137 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 48 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-12 16:27 UTCEPSS rescoreEPSS 25% · 97th percentile
  2. 2026-10-12 01:16 UTCEG score recompute
  3. 2026-10-11 13:40 UTCEPSS rescoreEPSS 25% · 97th percentile
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  6. 2026-10-08 22:58 UTCOSV refresh
  7. 2026-10-08 16:35 UTCEPSS rescoreEPSS 25% · 97th percentile
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  13. 2026-09-30 14:58 UTCEPSS rescoreEPSS 25% · 97th percentile
  14. 2026-09-30 09:03 UTCEG score recompute
  15. 2026-09-27 13:40 UTCEPSS rescoreEPSS 25% · 97th percentile
  16. 2026-09-26 15:53 UTCEPSS rescoreEPSS 25% · 97th percentile
  17. 2026-09-19 15:35 UTCEPSS rescoreEPSS 25% · 97th percentile
  18. 2026-09-19 05:36 UTCOSV refresh
  19. 2026-09-18 19:22 UTCEPSS rescoreEPSS 25% · 97th percentile
  20. 2026-09-17 19:21 UTCEPSS rescoreEPSS 25% · 97th percentile
  21. 2026-09-15 03:05 UTCEPSS rescoreEPSS 25% · 97th percentile
  22. 2026-09-12 14:55 UTCEPSS rescoreEPSS 25% · 97th percentile
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  24. 2026-09-10 09:26 UTCEPSS rescoreEPSS 25% · 97th percentile
  25. 2026-09-07 15:56 UTCEPSS rescoreEPSS 25% · 97th percentile
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  1. 2026-09-06 13:42 UTCEPSS rescoreEPSS 25% · 97th percentile
  2. 2026-09-05 15:23 UTCEPSS rescoreEPSS 25% · 97th percentile
  3. 2026-09-04 13:55 UTCEPSS rescoreEPSS 25% · 97th percentile
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  5. 2026-09-01 03:31 UTCEPSS rescoreEPSS 25% · 97th percentile
  6. 2026-08-31 08:58 UTCOSV refresh
  7. 2026-08-30 19:12 UTCEPSS rescoreEPSS 25% · 97th percentile
  8. 2026-08-27 14:20 UTCEPSS rescoreEPSS 25% · 97th percentile
  9. 2026-08-26 14:41 UTCEPSS rescoreEPSS 25% · 97th percentile
  10. 2026-08-25 13:44 UTCEPSS rescoreEPSS 25% · 97th percentile
  11. 2026-08-21 23:44 UTCEPSS rescoreEPSS 25% · 97th percentile
  12. 2026-08-20 22:50 UTCEPSS rescoreEPSS 25% · 97th percentile
  13. 2026-08-19 16:59 UTCEPSS rescoreEPSS 25% · 97th percentile
  14. 2026-08-18 13:43 UTCEPSS rescoreEPSS 25% · 97th percentile
  15. 2026-08-16 14:51 UTCEPSS rescoreEPSS 25% · 97th percentile
  16. 2026-08-16 02:09 UTCEPSS rescoreEPSS 25% · 97th percentile
  17. 2026-08-15 01:25 UTCEPSS rescoreEPSS 25% · 97th percentile
  18. 2026-08-14 15:24 UTCOSV refresh
  19. 2026-08-12 13:46 UTCEPSS rescoreEPSS 25% · 97th percentile
  20. 2026-08-07 16:22 UTCEPSS rescoreEPSS 25% · 97th percentile
  21. 2026-08-06 13:42 UTCEPSS rescoreEPSS 25% · 97th percentile
  22. 2026-08-05 19:12 UTCEPSS rescoreEPSS 25% · 97th percentile
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  24. 2026-08-02 02:22 UTCEPSS rescoreEPSS 25% · 97th percentile
  25. 2026-08-01 04:11 UTCEPSS rescoreEPSS 25% · 97th percentile
  26. 2026-07-30 16:23 UTCEPSS rescoreEPSS 25% · 97th percentile
  27. 2026-07-30 03:54 UTCOSV refresh
  28. 2026-07-30 01:26 UTCEPSS rescoreEPSS 25% · 97th percentile
  29. 2026-07-28 15:31 UTCEPSS rescoreEPSS 25% · 97th percentile
  30. 2026-07-26 14:50 UTCEPSS rescoreEPSS 25% · 97th percentile
  31. 2026-07-24 14:13 UTCEPSS rescoreEPSS 25% · 97th percentile
  32. 2026-07-23 14:14 UTCEPSS rescoreEPSS 25% · 97th percentile
  33. 2026-07-23 01:17 UTCEG score recompute
  34. 2026-07-23 00:19 UTCEG score recompute
  35. 2026-07-22 21:58 UTCEG score recompute
  36. 2026-07-22 14:04 UTCEPSS rescoreEPSS 25% · 97th percentile
  37. 2026-07-21 15:21 UTCEPSS rescoreEPSS 25% · 97th percentile
  38. 2026-07-20 17:03 UTCEPSS rescoreEPSS 25% · 97th percentile
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  41. 2026-07-18 10:00 UTCEPSS rescoreEPSS 25% · 97th percentile
  42. 2026-07-16 16:59 UTCEPSS rescoreEPSS 25% · 97th percentile
  43. 2026-07-15 16:54 UTCEPSS rescoreEPSS 25% · 97th percentile
  44. 2026-07-13 22:26 UTCEPSS rescoreEPSS 25% · 97th percentile
  45. 2026-07-12 13:08 UTCOSV refresh
  46. 2026-07-12 05:42 UTCEPSS rescoreEPSS 25% · 97th percentile
  47. 2026-07-11 08:23 UTCEPSS rescoreEPSS 25% · 97th percentile
  48. 2026-07-09 19:05 UTCEPSS rescoreEPSS 25% · 97th percentile
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  50. 2026-07-06 16:24 UTCEPSS rescoreEPSS 25% · 97th percentile
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  52. 2026-07-04 06:27 UTCEPSS rescoreEPSS 25% · 97th percentile
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  55. 2026-06-29 14:03 UTCEPSS rescoreEPSS 25% · 97th percentile
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  59. 2026-06-25 13:47 UTCEPSS rescoreEPSS 25% · 97th percentile
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  61. 2026-06-23 21:30 UTCEPSS rescoreEPSS 25% · 97th percentile
  62. 2026-06-23 18:50 UTCOSV refresh
  63. 2026-06-22 14:22 UTCEPSS rescoreEPSS 25% · 97th percentile
  64. 2026-06-21 01:57 UTCEPSS rescoreEPSS 25% · 97th percentile

Related CVEs(same product + same vendor)

Frequently asked(5)

What is CVE-2015-3193?
CVE-2015-3193 is a high-severity vulnerability; its CVE record was published on December 6, 2015. The Montgomery squaring implementation in crypto/bn/asm/x8664-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x8664 platform, as used by the BNmodexp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key…
When was CVE-2015-3193 made public?
CVE-2015-3193 was made public on December 4, 2015: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on December 6, 2015. EchelonGraph's copy of the record carries a last-modified date of May 6, 2026; the record at its source may have been updated since.
Is CVE-2015-3193 actively exploited?
CVE-2015-3193 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25% probability of exploitation in the next 30 days (97th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2015-3193?
CVE-2015-3193 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2015-3193?
A fix for CVE-2015-3193 is available: update to the fixed version the vendor names in its advisory.

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