CVE-2020-10531

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

An issue was discovered in International Components for Unicode (ICU) for C/C++ through 66.1. An integer overflow, leading to a heap-based buffer overflow, exists in the UnicodeString::doAppend() function in common/unistr.cpp.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity88% × 45%
Exploitation3% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
3%
EPSS %ILE
85%
KEV
Not listed

Published

March 12, 2020

Last Modified

November 21, 2024

Advisory Details (9)

Auto-updated Aug 4, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: redhat, github_commit, github_pr.
generic

[SECURITY] Fedora 30 Update: chromium-80.0.3987.149-1.fc30 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IOHSO6BUKC6I66J5PZOMAGFVJ66ZS57/
generic

[SECURITY] Fedora 33 Update: nodejs-14.15.1-1.fc33 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
generic Patch Available

[SECURITY] [DLA 2151-1] icu security update

https://lists.debian.org/debian-lts-announce/2020/03/msg00024.html
github_pr

ICU-20958 Prevent SEGV_MAPERR in UnicodeString::doAppend()

Fix merged in unicode-org/icu PR #971 on 2020-02-03 — awaiting tagged release

https://github.com/unicode-org/icu/pull/971
github_commit

commit b7d08bc04a42 (unicode-org/icu)

Fix landed in unicode-org/icu commit b7d08bc04a42 — awaiting tagged release

https://github.com/unicode-org/icu/commit/b7d08bc04a4296982fcef8b6b8a354a9e4e7afca
generic

9f4020916eb1f28f3666f018fdcbe6c9a37f0e08 - chromium/deps/icu - Git at Google

https://chromium.googlesource.com/chromium/deps/icu/+/9f4020916eb1f28f3666f018fdcbe6c9a37f0e08
generic🔴 Active Exploitation

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop_24.html
generic
https://bugs.chromium.org/p/chromium/issues/detail?id=1044570
redhat Patch Available

Affected: Red Hat Enterprise Linux 6 Supplementary.

https://access.redhat.com/errata/RHSA-2020:0738

Patch Availability(11)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibicu52 (52.1-3ubuntu0.8+esm1) @ trusty2026-05-27ubuntu
redhatrh-nodejs10-nodejs-0:10.21.0-3.el72020-07-21redhat
redhatrh-nodejs12-nodejs-0:12.18.2-1.el72020-07-13redhat
redhatnodejs:10-8000020200318152927.f8e95b4e2020-04-07redhat
redhatnodejs:10-8010020200318152252.c27ad7f82020-04-06redhat
redhatnodejs:12-8010020200326104226.c27ad7f82020-04-02redhat
redhaticu-0:60.3-2.el8_02020-03-19redhat
redhaticu-0:60.3-2.el8_12020-03-19redhat
redhaticu-0:50.2-4.el7_72020-03-18redhat
redhaticu-0:4.2.1-15.el6_102020-03-18redhat
redhatchromium-browser-0:80.0.3987.122-1.el6_102020-03-09redhat

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

(24 across 24 ecosystems)
Alpine:v3.10(1)
PackageVulnerable rangeFixed inDependents
icu—64.2-r1—
Alpine:v3.11(1)
PackageVulnerable rangeFixed inDependents
icu—64.2-r1—
Alpine:v3.12(1)
PackageVulnerable rangeFixed inDependents
icu—65.1-r1—
Alpine:v3.13(1)
PackageVulnerable rangeFixed inDependents
icu—65.1-r1—
Alpine:v3.14(1)
PackageVulnerable rangeFixed inDependents
icu—65.1-r1—
Alpine:v3.15(1)
PackageVulnerable rangeFixed inDependents
icu—65.1-r1—
Alpine:v3.16(1)
PackageVulnerable rangeFixed inDependents
icu—65.1-r1—
Alpine:v3.17(1)
PackageVulnerable rangeFixed inDependents
icu—65.1-r1—
Alpine:v3.18(1)
PackageVulnerable rangeFixed inDependents
icu—65.1-r1—
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
icu—65.1-r1—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
icu—65.1-r1—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
icu—65.1-r1—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
icu—65.1-r1—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
icu—65.1-r1—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
icu—65.1-r1—
Alpine:v3.8(1)
PackageVulnerable rangeFixed inDependents
icu—60.2-r3—
Alpine:v3.9(1)
PackageVulnerable rangeFixed inDependents
icu—62.1-r1—
Debian:10(1)
PackageVulnerable rangeFixed inDependents
icu63.1-663.1-6+deb10u1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
icu—63.2-3—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
icu—63.2-3—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
icu—63.2-3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
icu—63.2-3—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
icu52.1-8 ... 52.1-8+deb8u7 (7 versions)52.1-8+deb8u8—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
icu57.1-6, 57.1-6+deb9u1, 57.1-6+deb9u2, 57.1-6+deb9u357.1-6+deb9u4—

Weakness Classification(2)

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

All Vendor Advisories

(11)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 25× 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 154 total refreshes for this CVE.

  1. 2026-09-20 20:11 UTCEPSS rescore
  2. 2026-09-19 15:37 UTCEPSS rescore
  3. 2026-09-18 19:23 UTCEPSS rescore
  4. 2026-09-17 19:22 UTCEPSS rescore
  5. 2026-09-16 14:04 UTCEPSS rescore
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  7. 2026-09-15 03:06 UTCEPSS rescore
  8. 2026-09-13 16:42 UTCEPSS rescore
  9. 2026-09-12 14:56 UTCEPSS rescore
  10. 2026-09-11 14:48 UTCEPSS rescore
  11. 2026-09-11 09:32 UTCEPSS rescore
  12. 2026-09-07 16:51 UTCOSV refresh
  13. 2026-09-07 15:57 UTCEPSS rescore
  14. 2026-09-06 13:44 UTCEPSS rescore
  15. 2026-09-05 15:24 UTCEPSS rescore
  16. 2026-09-04 13:56 UTCEPSS rescore
  17. 2026-09-04 05:03 UTCEPSS rescore
  18. 2026-09-02 14:08 UTCEPSS rescore
  19. 2026-09-01 03:32 UTCEPSS rescore
  20. 2026-08-30 19:14 UTCEPSS rescore
  21. 2026-08-30 01:18 UTCEPSS rescore
  22. 2026-08-28 21:37 UTCEPSS rescore
  23. 2026-08-27 14:21 UTCEPSS rescore
  24. 2026-08-26 14:42 UTCEPSS rescore
  25. 2026-08-25 13:45 UTCEPSS rescore
Show 75 more
  1. 2026-08-21 02:21 UTCOSV refresh
  2. 2026-08-20 22:51 UTCEPSS rescore
  3. 2026-08-19 17:00 UTCEPSS rescore
  4. 2026-08-18 13:44 UTCEPSS rescore
  5. 2026-08-17 13:43 UTCEPSS rescore
  6. 2026-08-16 14:52 UTCEPSS rescore
  7. 2026-08-16 02:11 UTCEPSS rescore
  8. 2026-08-15 01:26 UTCEPSS rescore
  9. 2026-08-13 21:57 UTCEPSS rescore
  10. 2026-08-12 13:47 UTCEPSS rescore
  11. 2026-08-09 13:43 UTCEPSS rescore
  12. 2026-08-08 16:33 UTCEPSS rescore
  13. 2026-08-07 16:23 UTCEPSS rescore
  14. 2026-08-06 13:43 UTCEPSS rescore
  15. 2026-08-05 19:14 UTCEPSS rescore
  16. 2026-08-05 17:41 UTCOSV refresh
  17. 2026-08-04 15:06 UTCEPSS rescore
  18. 2026-08-04 10:34 UTCEPSS rescore
  19. 2026-08-03 10:32 UTCEPSS rescore
  20. 2026-08-02 02:23 UTCEPSS rescore
  21. 2026-08-01 04:12 UTCEPSS rescore
  22. 2026-07-30 16:24 UTCEPSS rescore
  23. 2026-07-30 01:27 UTCEPSS rescore
  24. 2026-07-28 15:32 UTCEPSS rescore
  25. 2026-07-26 14:51 UTCEPSS rescore
  26. 2026-07-25 14:14 UTCEPSS rescore
  27. 2026-07-24 14:14 UTCEPSS rescore
  28. 2026-07-23 14:15 UTCEPSS rescore
  29. 2026-07-23 14:15 UTCEPSS rescore
  30. 2026-07-23 01:48 UTCEG score recompute
  31. 2026-07-22 22:32 UTCEG score recompute
  32. 2026-07-22 14:05 UTCEPSS rescore
  33. 2026-07-21 15:22 UTCEPSS rescore
  34. 2026-07-21 15:22 UTCEPSS rescore
  35. 2026-07-20 17:04 UTCEPSS rescore
  36. 2026-07-19 16:18 UTCOSV refresh
  37. 2026-07-19 14:28 UTCEPSS rescore
  38. 2026-07-19 14:28 UTCEPSS rescore
  39. 2026-07-19 02:26 UTCEPSS rescore
  40. 2026-07-19 02:26 UTCEPSS rescore
  41. 2026-07-18 10:02 UTCEPSS rescore
  42. 2026-07-16 16:59 UTCEPSS rescore
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  44. 2026-07-15 16:55 UTCEPSS rescore
  45. 2026-07-13 22:27 UTCEPSS rescore
  46. 2026-07-13 06:10 UTCEPSS rescore
  47. 2026-07-13 06:10 UTCEPSS rescore
  48. 2026-07-12 05:44 UTCEPSS rescore
  49. 2026-07-11 08:24 UTCEPSS rescore
  50. 2026-07-09 19:06 UTCEPSS rescore
  51. 2026-07-08 15:11 UTCEPSS rescore
  52. 2026-07-07 13:43 UTCEPSS rescore
  53. 2026-07-06 16:25 UTCEPSS rescore
  54. 2026-07-06 16:25 UTCEPSS rescore
  55. 2026-07-06 02:20 UTCEPSS rescore
  56. 2026-07-05 02:27 UTCEPSS rescore
  57. 2026-07-04 06:28 UTCEPSS rescore
  58. 2026-07-02 05:17 UTCOSV refresh
  59. 2026-07-01 15:03 UTCEPSS rescore
  60. 2026-07-01 15:03 UTCEPSS rescore
  61. 2026-06-30 23:20 UTCEPSS rescore
  62. 2026-06-30 23:20 UTCEPSS rescore
  63. 2026-06-29 14:04 UTCEPSS rescore
  64. 2026-06-29 14:04 UTCEPSS rescore
  65. 2026-06-28 14:05 UTCEPSS rescore
  66. 2026-06-28 04:54 UTCEPSS rescore
  67. 2026-06-28 04:54 UTCEPSS rescore
  68. 2026-06-27 03:06 UTCEPSS rescore
  69. 2026-06-25 13:47 UTCEPSS rescore
  70. 2026-06-25 13:47 UTCEPSS rescore
  71. 2026-06-24 14:03 UTCEPSS rescore
  72. 2026-06-24 14:03 UTCEPSS rescore
  73. 2026-06-22 14:23 UTCEPSS rescore
  74. 2026-06-22 14:23 UTCEPSS rescore
  75. 2026-06-21 14:54 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2020-10531?
CVE-2020-10531 is a high vulnerability published on March 12, 2020. An issue was discovered in International Components for Unicode (ICU) for C/C++ through 66.1. An integer overflow, leading to a heap-based buffer overflow, exists in the UnicodeString::doAppend() function in common/unistr.cpp.
When was CVE-2020-10531 disclosed?
CVE-2020-10531 was first published in the National Vulnerability Database on March 12, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-10531 actively exploited?
CVE-2020-10531 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 14.9% of all scored CVEs.
What is the CVSS score of CVE-2020-10531?
CVE-2020-10531 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2020-10531?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-10531, 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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