CVE-2016-6606

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2022-05-17. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

An issue was discovered in cookie encryption in phpMyAdmin. The decryption of the username/password is vulnerable to a padding oracle attack. This can allow an attacker who has access to a user's browser cookie file to decrypt the username and password. Furthermore, the same initialization vector (IV) is used to hash the username and password stored in the phpMyAdmin cookie. If a user has the same password as their username, an attacker who examines the browser cookie can see that they are the same - but the attacker can not directly decode these values from the cookie as it is still hashed. All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 4.4.15.8), and 4.0.x versions (prior to 4.0.10.17) are affected.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity81% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
71%
KEV
Not listed

Published

December 11, 2016

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Sep 12, 2026
Patch available.
generic

PMASA-2016-29 · phpMyAdmin

https://www.phpmyadmin.net/security/PMASA-2016-29
generic

phpMyAdmin: Multiple vulnerabilities (GLSA 201701-32) — Gentoo security

https://security.gentoo.org/glsa/201701-32
generic Patch Available

[SECURITY] [DLA 1821-1] phpmyadmin security update

https://lists.debian.org/debian-lts-announce/2019/06/msg00009.html
generic

CVE-2016-6606 - PSIRT.COM

http://www.securityfocus.com/bid/94114

Affected Packages

(6 across 6 ecosystems)
Alpine:v3.2(1)
PackageVulnerable rangeFixed inDependents
phpmyadmin3.3.10-r0 ... 4.4.7-r0 (68 versions)4.4.15.8-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
phpmyadmin—4:4.6.4+dfsg1-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
phpmyadmin—4:4.6.4+dfsg1-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
phpmyadmin—4:4.6.4+dfsg1-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
phpmyadmin—4:4.6.4+dfsg1-1—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
phpmyadmin4:3.4.11.1-2 ... 4:3.4.11.1-2+deb7u5 (6 versions)4:3.4.11.1-2+deb7u6—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 22× 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 147 total refreshes for this CVE.

  1. 2026-09-19 15:35 UTCEPSS rescore
  2. 2026-09-18 19:22 UTCEPSS rescore
  3. 2026-09-18 17:50 UTCOSV refresh
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  17. 2026-08-30 21:04 UTCOSV refresh
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  1. 2026-08-16 14:51 UTCEPSS rescore
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  4. 2026-08-14 07:59 UTCOSV refresh
  5. 2026-08-12 13:46 UTCEPSS rescore
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  18. 2026-07-29 16:07 UTCOSV refresh
  19. 2026-07-28 15:31 UTCEPSS rescore
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  23. 2026-07-23 14:15 UTCEPSS rescore
  24. 2026-07-23 01:23 UTCEG score recompute
  25. 2026-07-22 22:03 UTCEG score recompute
  26. 2026-07-22 14:04 UTCEPSS rescore
  27. 2026-07-21 15:21 UTCEPSS rescore
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  45. 2026-07-12 05:39 UTCOSV refresh
  46. 2026-07-11 08:24 UTCEPSS rescore
  47. 2026-07-09 19:06 UTCEPSS rescore
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  74. 2026-06-18 17:50 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2016-6606?
CVE-2016-6606 is a high vulnerability published on December 11, 2016. An issue was discovered in cookie encryption in phpMyAdmin. The decryption of the username/password is vulnerable to a padding oracle attack. This can allow an attacker who has access to a user's browser cookie file to decrypt the username and password. Furthermore, the same initialization vector…
When was CVE-2016-6606 disclosed?
CVE-2016-6606 was first published in the National Vulnerability Database on December 11, 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-2016-6606 actively exploited?
CVE-2016-6606 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 29.0% of all scored CVEs.
What is the CVSS score of CVE-2016-6606?
CVE-2016-6606 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2016-6606?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-6606, 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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