CVE-2012-2122

MEDIUMCVSS v2 · 5.15.1—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 5.1 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:H/Au:N/C:P/I:P/A:P. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 96.2% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Trending — 4 sources updated this weekWeaponized
5.1EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 96%
  • Public exploit code is available (Metasploit, Exploit-DB (verified), epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 96%CVSS v2: 5.1Exploit: Metasploit · Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed: 0

A fix is available — apply it.

sql/password.c in Oracle MySQL 5.1.x before 5.1.63, 5.5.x before 5.5.24, and 5.6.x before 5.6.6, and MariaDB 5.1.x before 5.1.62, 5.2.x before 5.2.12, 5.3.x before 5.3.6, and 5.5.x before 5.5.23, when running in certain environments with certain implementations of the memcmp function, allows remote attackers to bypass authentication by repeatedly authenticating with the same incorrect password, which eventually causes a token comparison to succeed due to an improperly-checked return value.

CVSS v2.0 (legacy)
5.1MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
5.1(low)
EG Risk
66(Track)
EG Risk 66/100SSVC: Track

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
Severity51% × 45%
Exploitation96% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
96%
EPSS %ILE
100%
KEV
Not listed

Published

June 26, 2012

Last Modified

April 29, 2026

References (22)

Vendor Advisories for CVE-2012-2122(1)

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
ubuntumysql-server-5.1 (5.1.63-0ubuntu0.11.04.1) @ natty2026-05-29ubuntu
redhatmysql-0:5.1.66-1.el6_32012-11-14redhat

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

(1)

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 13× in last 7d / 14× 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. 2026-07-26 13:45 UTCEG score recompute▲ 5.10
  2. 2026-07-25 14:12 UTCEPSS rescore
  3. 2026-07-23 01:11 UTCVendor advisory
  4. 2026-07-23 01:11 UTCGHSA enrichment
  5. 2026-07-23 01:08 UTCVendor advisory
  6. 2026-07-23 01:08 UTCGHSA enrichment
  7. 2026-07-23 01:07 UTCVendor advisory
  8. 2026-07-23 01:07 UTCGHSA enrichment
  9. 2026-07-23 01:07 UTCEG score recompute▼ 9.00
  10. 2026-07-23 00:10 UTCEG score recompute
  11. 2026-07-22 21:49 UTCEG score recompute
  12. 2026-07-22 14:04 UTCEPSS rescore
  13. 2026-07-22 14:04 UTCEPSS rescore
  14. 2026-07-09 19:05 UTCEPSS rescore
  15. 2026-06-23 21:30 UTCEPSS rescore
  16. 2026-06-22 14:22 UTCEPSS rescore
  17. 2026-06-22 14:22 UTCEPSS rescore
  18. 2026-06-19 19:22 UTCEPSS rescore
  19. 2026-06-19 19:22 UTCEPSS rescore
  20. 2026-06-16 17:49 UTCEPSS rescore
  21. 2026-06-16 17:49 UTCEPSS rescore
  22. 2026-06-15 17:44 UTCEPSS rescore
  23. 2026-06-04 13:09 UTCEPSS rescore
  24. 2026-05-31 00:14 UTCEPSS rescore
  25. 2026-05-31 00:14 UTCEPSS rescore
Show 12 more
  1. 2026-05-29 04:11 UTCEG score recompute
  2. 2026-05-29 04:11 UTCVendor advisory
  3. 2026-05-29 04:11 UTCGHSA enrichment
  4. 2026-05-26 07:16 UTCEPSS rescore
  5. 2026-05-26 07:16 UTCEPSS rescore
  6. 2026-05-26 07:16 UTCEPSS rescore
  7. 2026-05-22 21:15 UTCEPSS rescore
  8. 2026-05-22 21:15 UTCEPSS rescore
  9. 2026-05-22 21:15 UTCEPSS rescore
  10. 2026-05-21 22:39 UTCEPSS rescore
  11. 2026-05-18 21:29 UTCEPSS rescore
  12. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 Metasploit module) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-19092✓ verified
    First seen Jun 12, 2012

    MySQL - Authentication Bypass

    Open source ↗
  • Metasploitauxiliary/scanner/mysql/mysql_authbypass_hashdump✓ verified
    First seen Jun 9, 2012

    MySQL Authentication Bypass Password Dump

    Open source ↗
  • Nucleijavascript/cves/2012/CVE-2012-2122.yaml
    First seen Jan 1, 2012

    MySQL - Authentication Bypass

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(4)

What is CVE-2012-2122?
CVE-2012-2122 is a medium vulnerability published on June 26, 2012. sql/password.c in Oracle MySQL 5.1.x before 5.1.63, 5.5.x before 5.5.24, and 5.6.x before 5.6.6, and MariaDB 5.1.x before 5.1.62, 5.2.x before 5.2.12, 5.3.x before 5.3.6, and 5.5.x before 5.5.23, when running in certain environments with certain implementations of the memcmp function, allows remote…
When was CVE-2012-2122 disclosed?
CVE-2012-2122 was first published in the National Vulnerability Database on June 26, 2012, 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-2012-2122 actively exploited?
CVE-2012-2122 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 96% probability of exploitation in the next 30 days, which ranks it in the top 0.1% of all scored CVEs.
How do I remediate CVE-2012-2122?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-2122, 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.

Dependency Blast Radius

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