CVE-2020-7060

CRITICALNVD 6.59.1
EchelonGraph scoreMEDIUM confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score 9.1 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 6.5; sources differ by 2.6.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this weekElevated
9.1EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 8.9%CVSS: 6.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

When using certain mbstring functions to convert multibyte encodings, in PHP versions 7.2.x below 7.2.27, 7.3.x below 7.3.14 and 7.4.x below 7.4.2 it is possible to supply data that will cause function mbfl_filt_conv_big5_wchar to read past the allocated buffer. This may lead to information disclosure or crash.

CVSS v3
6.5
EG Score
9.1CRITICALmedium confidence
EG Risk
57
EG Risk 57/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity91% × 45%
Impact severity (EG Severity): CVSS 9.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
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
8.9%
EPSS %ILE
95th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.1): severity, escalated by confirmed exploitation. This CVE's 9.1 is its impact severity (EG Severity), not escalated.

EG Severity
9.1 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
8.9% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-23). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

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

February 10, 2020

Last Modified

November 21, 2024

Advisory Details (8)

Auto-updated Oct 14, 2026
Patch available.
Web page

[SECURITY] [DSA 4626-1] php7.3 security update

https://www.debian.org/security/2020/dsa-4626
Web page

PHP: Multiple vulnerabilities (GLSA 202003-57) — Gentoo security

https://security.gentoo.org/glsa/202003-57
Web page

Bugtraq: Re: [SECURITY] [DSA 4628-1] php7.0 security update

https://seclists.org/bugtraq/2021/Jan/3
Web page

Bugtraq: [SECURITY] [DSA 4628-1] php7.0 security update

https://seclists.org/bugtraq/2020/Feb/31
Web page

Bugtraq: [SECURITY] [DSA 4626-1] php7.3 security update

https://seclists.org/bugtraq/2020/Feb/27
Web pageMentions a patch (unverified)

[SECURITY] [DLA 2124-1] php5 security update

https://lists.debian.org/debian-lts-announce/2020/02/msg00030.html
Web page

PHP :: Sec Bug #79037 :: global buffer-overflow in `mbfl_filt_conv_big5_wchar`

https://bugs.php.net/bug.php?id=79037

Vendor Advisories for CVE-2020-7060(2)

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

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuphp7.3-zip (7.3.11-0ubuntu0.19.10.3) @ eoan2026-10-23ubuntu
redhatrh-php73-php-0:7.3.20-1.el72020-12-01redhat
redhatphp:7.3-8020020200715124551.ceb1cf902020-09-08redhat

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:10(1)
PackageVulnerable rangeFix by version rangeDependents
php7.37.3.10-1 ... 7.3.9-1~deb10u1 (8 versions)
  • every version up to 7.3.14-1~deb10u1: fixed in 7.3.14-1~deb10u1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
php7.4—
  • every version up to 7.4.2-7: fixed in 7.4.2-7
—
Debian:8(1)
PackageVulnerable rangeFix by version rangeDependents
php55.6.11+dfsg-1 ... 5.6.9+dfsg-1 (54 versions)
  • every version up to 5.6.40+dfsg-0+deb8u9: fixed in 5.6.40+dfsg-0+deb8u9
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
php7.07.0.19-1 ... 7.0.33-0+deb9u6 (22 versions)
  • every version up to 7.0.33-0+deb9u7: fixed in 7.0.33-0+deb9u7
—

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 31× in last 7d / 66× 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 96 of 214 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. 4 repeat rows among the latest 100 are merged into the row they repeat. The 118 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-23 21:19 UTCEG score recompute
  2. 2026-10-23 21:19 UTCVendor advisory
  3. 2026-10-23 21:19 UTCGHSA enrichmentGHSA-ch28-9wjf-88gw · GitHub CVSS 9.1
  4. 2026-10-23 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  5. 2026-10-22 23:02 UTCEG score recompute
  6. 2026-10-22 23:02 UTCVendor advisory
  7. 2026-10-22 23:02 UTCGHSA enrichmentGHSA-ch28-9wjf-88gw · GitHub CVSS 9.1
  8. 2026-10-22 16:29 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  9. 2026-10-22 00:45 UTCEG score recompute
  10. 2026-10-22 00:45 UTCVendor advisory
  11. 2026-10-22 00:45 UTCGHSA enrichmentGHSA-ch28-9wjf-88gw · GitHub CVSS 9.1
  12. 2026-10-21 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  13. 2026-10-21 01:56 UTCEG score recompute
  14. 2026-10-21 01:56 UTCVendor advisory
  15. 2026-10-21 01:56 UTCGHSA enrichmentGHSA-ch28-9wjf-88gw · GitHub CVSS 9.1
  16. 2026-10-20 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  17. 2026-10-20 03:39 UTCEG score recompute
  18. 2026-10-20 03:39 UTCVendor advisory
  19. 2026-10-20 03:39 UTCGHSA enrichmentGHSA-ch28-9wjf-88gw · GitHub CVSS 9.1
  20. 2026-10-19 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  21. 2026-10-19 04:18 UTCEG score recompute
  22. 2026-10-19 04:18 UTCVendor advisory
  23. 2026-10-19 04:17 UTCGHSA enrichmentGHSA-ch28-9wjf-88gw · GitHub CVSS 9.1
  24. 2026-10-18 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  25. 2026-10-18 05:57 UTCEG score recompute
Show 71 more
  1. 2026-10-18 05:57 UTCVendor advisory
  2. 2026-10-18 05:57 UTCGHSA enrichmentGHSA-ch28-9wjf-88gw · GitHub CVSS 9.1
  3. 2026-10-17 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  4. 2026-10-17 07:40 UTCEG score recompute
  5. 2026-10-17 07:40 UTCVendor advisory
  6. 2026-10-17 07:39 UTCGHSA enrichmentGHSA-ch28-9wjf-88gw · GitHub CVSS 9.1
  7. 2026-10-16 16:33 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  8. 2026-10-16 09:20 UTCEG score recompute
  9. 2026-10-16 09:20 UTCVendor advisory
  10. 2026-10-16 09:20 UTCGHSA enrichmentGHSA-ch28-9wjf-88gw · GitHub CVSS 9.1
  11. 2026-10-15 16:27 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  12. 2026-10-15 08:54 UTCEG score recompute
  13. 2026-10-15 08:54 UTCVendor advisory
  14. 2026-10-15 08:53 UTCGHSA enrichmentGHSA-ch28-9wjf-88gw · GitHub CVSS 9.1
  15. 2026-10-14 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  16. 2026-10-14 05:09 UTCEG score recompute
  17. 2026-10-14 05:09 UTCVendor advisory
  18. 2026-10-14 05:08 UTCGHSA enrichmentGHSA-ch28-9wjf-88gw · GitHub CVSS 9.1
  19. 2026-10-13 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  20. 2026-10-13 00:27 UTCVendor advisory
  21. 2026-10-13 00:27 UTCGHSA enrichmentGHSA-ch28-9wjf-88gw · GitHub CVSS 9.1
  22. 2026-10-12 19:32 UTCEG score recompute
  23. 2026-10-12 16:29 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  24. 2026-10-11 23:56 UTCEG score recompute
  25. 2026-10-11 13:43 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  26. 2026-10-10 19:56 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  27. 2026-10-09 20:04 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  28. 2026-10-08 16:39 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  29. 2026-10-07 23:44 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  30. 2026-10-06 15:13 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  31. 2026-10-05 17:40 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  32. 2026-10-03 14:22 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  33. 2026-10-02 16:22 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  34. 2026-10-01 19:46 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  35. 2026-09-30 15:22 UTCEG score recompute
  36. 2026-09-30 14:59 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  37. 2026-09-27 13:41 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  38. 2026-09-27 10:07 UTCOSV refresh
  39. 2026-09-26 15:54 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  40. 2026-09-26 00:21 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  41. 2026-09-24 14:00 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  42. 2026-09-22 14:44 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  43. 2026-09-21 20:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  44. 2026-09-19 15:37 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  45. 2026-09-18 19:23 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  46. 2026-09-17 19:22 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  47. 2026-09-16 14:04 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  48. 2026-09-15 03:06 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  49. 2026-09-12 14:57 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  50. 2026-09-08 21:56 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  51. 2026-09-07 19:21 UTCOSV refresh
  52. 2026-09-07 15:58 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  53. 2026-09-06 13:44 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  54. 2026-09-05 15:25 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  55. 2026-09-04 13:57 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  56. 2026-09-04 05:03 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  57. 2026-09-02 14:08 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  58. 2026-09-01 03:32 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  59. 2026-08-30 19:14 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  60. 2026-08-30 01:19 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  61. 2026-08-28 21:37 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  62. 2026-08-27 14:21 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  63. 2026-08-26 14:42 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  64. 2026-08-21 23:45 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  65. 2026-08-21 05:14 UTCOSV refresh
  66. 2026-08-19 17:00 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  67. 2026-08-18 13:44 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  68. 2026-08-17 13:43 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  69. 2026-08-16 14:52 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  70. 2026-08-16 02:11 UTCEPSS rescoreEPSS 8.9% · 94th percentile
  71. 2026-08-15 01:27 UTCEPSS rescoreEPSS 8.9% · 94th percentile

Frequently asked(5)

What is CVE-2020-7060?
CVE-2020-7060 is a critical-severity vulnerability; its CVE record was published on February 10, 2020. When using certain mbstring functions to convert multibyte encodings, in PHP versions 7.2.x below 7.2.27, 7.3.x below 7.3.14 and 7.4.x below 7.4.2 it is possible to supply data that will cause function mbflfiltconvbig5wchar to read past the allocated buffer. This may lead to information disclosure…
When was CVE-2020-7060 made public?
CVE-2020-7060 was made public on January 21, 2020: that is the date its CVE record's CNA, PHP Group, gives for when the vulnerability was made public. The CVE record itself was published on February 10, 2020. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
Is CVE-2020-7060 actively exploited?
CVE-2020-7060 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8.9% probability of exploitation in the next 30 days (95th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-7060?
CVE-2020-7060 has a CVSS v3 base score of 6.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.1 (CRITICAL).
How do I remediate CVE-2020-7060?
A fix for CVE-2020-7060 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2020-7060 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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