CVE-2020-16048Network attack vector

Sensitive-data disclosure via incorrect depth-pitch calculation

Published Nov 2, 2021 · Updated Aug 4, 2024

Out-of-bounds read in ANGLE in Mozilla Firefox and Firefox ESR allows remote attackers to disclose sensitive data via crafted HTML. ANGLE's depth-pitch calculation ignores compressed-texture block size and multiplies row pitch by pixel height, causing load functions to read beyond a user-supplied buffer. A Windows user must visit a malicious page or open a malicious file; affected releases are Firefox before 85.0.1 and Firefox ESR before 78.7.1, and the flaw does not itself provide code execution.

CVSS severity6.5
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in ANGLE in Mozilla Firefox and Firefox ESR allows remote attackers to disclose sensitive data via crafted HTML. ANGLE's depth-pitch calculation ignores compressed-texture block size and multiplies row pitch by pixel height, causing load functions to read beyond a user-supplied buffer. A Windows user must visit a malicious page or open a malicious file; affected releases are Firefox before 85.0.1 and Firefox ESR before 78.7.1, and the flaw does not itself provide code execution.

The record

CVE
CVE-2020-16048
Published
Nov 2, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5National Institute of Standards and TechnologyCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.3National Institute of Standards and TechnologyAV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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