CVE-2013-7440

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2022-05-17. NVD baseline CVSS 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1.9%CVSS: 5.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

The ssl.match_hostname function in CPython (aka Python) before 2.7.9 and 3.x before 3.3.3 does not properly handle wildcards in hostnames, which might allow man-in-the-middle attackers to spoof servers via a crafted certificate.

CVSS v3
5.9
EG Score
5.9MEDIUMmedium confidence
EG Risk
32
EG Risk 32/100CISA SSVC

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
Severity59% × 45%
Exploitation2% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.9%
EPSS %ILE
78th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

June 7, 2016

Last Modified

June 17, 2026

References (14)

Vendor Advisories for CVE-2013-7440(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpython27-scipy-0:0.12.1-4.el72016-05-31redhat
redhatpython-httplib2-0:0.6.0-6.el7sat2014-09-10redhat

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

(1 across 1 ecosystem)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
python2.7—2.7.9-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 3× in last 7d / 15× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 148 total refreshes for this CVE.

  1. 2026-09-30 14:58 UTCEPSS rescore
  2. 2026-09-30 00:18 UTCEG score recompute
  3. 2026-09-28 13:45 UTCEPSS rescore
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  1. 2026-08-18 13:43 UTCEPSS rescore
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  5. 2026-08-14 11:46 UTCOSV refresh
  6. 2026-08-09 13:42 UTCEPSS rescore
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  18. 2026-07-23 01:11 UTCEG score recompute
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  20. 2026-07-22 21:53 UTCEG score recompute
  21. 2026-07-22 14:04 UTCEPSS rescore
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  24. 2026-07-20 17:03 UTCEPSS rescore
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  26. 2026-07-19 14:27 UTCEPSS rescore
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  47. 2026-06-30 23:19 UTCEPSS rescore
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  50. 2026-06-28 04:53 UTCEPSS rescore
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  75. 2026-06-13 22:57 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2013-7440?
CVE-2013-7440 is a medium vulnerability published on June 7, 2016. The ssl.match_hostname function in CPython (aka Python) before 2.7.9 and 3.x before 3.3.3 does not properly handle wildcards in hostnames, which might allow man-in-the-middle attackers to spoof servers via a crafted certificate.
When was CVE-2013-7440 disclosed?
CVE-2013-7440 was first published on June 7, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2013-7440 actively exploited?
CVE-2013-7440 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.9% probability of exploitation in the next 30 days (78th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2013-7440?
CVE-2013-7440 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2013-7440?
A fix for CVE-2013-7440 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2013-7440 are linked in the Vendor Advisories panel on this page.

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