CVE-2010-3493

NONECVSS 0.0
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 3%CVSS: —Exploit: NoneExposed: 0

A fix is available — apply it.

Multiple race conditions in smtpd.py in the smtpd module in Python 2.6, 2.7, 3.1, and 3.2 alpha allow remote attackers to cause a denial of service (daemon outage) by establishing and then immediately closing a TCP connection, leading to the accept function having an unexpected return value of None, an unexpected value of None for the address, or an ECONNABORTED, EAGAIN, or EWOULDBLOCK error, or the getpeername function having an ENOTCONN error, a related issue to CVE-2010-3492.

CVSS v3
—
EG Score
0.0(none)
EG Risk
0
EG Risk 0/100

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. It is distinct from the 0–10 EG Score, which measures severity.

EPSS
84.8%
KEV
Not listed

Published

October 19, 2010

Last Modified

April 29, 2026

References (48)

Vendor Advisories for CVE-2010-3493(3)

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 / EcosystemFixed in / PatchReleasedSource
ubuntupython2.5 (2.5.2-2ubuntu6.2) @ hardy2026-05-29ubuntu
ubuntupython2.4 (2.4.5-1ubuntu4.4) @ hardy2026-05-29ubuntu
ubuntupython3.2-minimal (3.2-1ubuntu1.1) @ natty2026-05-29ubuntu
ubuntupython2.6 (2.6.5-1ubuntu6.1) @ lucid2026-05-29ubuntu
redhatpython-docs-0:2.6.6-2.el62011-05-19redhat
redhatpython-0:2.3.4-14.10.el42011-05-05redhat
redhatpython-0:2.4.3-44.el52011-05-05redhat

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.

Weakness Classification(1)

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

Additional Vendor Advisories

(4)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 35× 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.

  1. 2026-07-23 01:03 UTCEG score recompute
  2. 2026-07-23 00:39 UTCEG score recompute
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  53. 2026-05-29 09:59 UTCVendor advisory
  54. 2026-05-29 09:59 UTCGHSA enrichment
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Related CVEs(same vendor + same CWE)

Frequently asked(4)

What is CVE-2010-3493?
CVE-2010-3493 is a none vulnerability published on October 19, 2010. Multiple race conditions in smtpd.py in the smtpd module in Python 2.6, 2.7, 3.1, and 3.2 alpha allow remote attackers to cause a denial of service (daemon outage) by establishing and then immediately closing a TCP connection, leading to the accept function having an unexpected return value of…
When was CVE-2010-3493 disclosed?
CVE-2010-3493 was first published in the National Vulnerability Database on October 19, 2010, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2010-3493 actively exploited?
CVE-2010-3493 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2010-3493?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2010-3493, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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