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CVE-2022-4087

19
FAUCET Score

CVE-2022-4087 is an information exposure vulnerability in iPXE, specifically within the tls_new_ciphertext function of the TLS component. It allows for information exposure through discrepancy due to improper handling of the pad_len argument. Rated as Medium severity (CVSS 4.3), this vulnerability can be exploited over the network with low attack complexity and requires low privileges, leading to a potential loss of confidentiality. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2022-11-08CPE matchmatch criteria
cpe:2.3:o:ipxe:ipxe:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

2.6LOW

CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.48%
Probability of exploitation in next 30 days
EPSS Percentile
38.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0048 is in the 48th percentile among its peer group of 21,939 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (2)

redhatCVE-2022-4087Low

ipxe: Padding oracle attack vulnerability

Nov 21, 2022
microsoft2022-Nov/CVE-2022-4087

iPXE TLS tls.c tls_new_ciphertext information exposure

Nov 8, 2022

References

github.com / ipxe/ipxe/commit/186306d6199096b7a7c4b4574d4be8cdb8426729
PatchThird Party Advisory
vuldb.com
Third Party Advisory