PT-2026-40259 · Microsoft · Edge

Spandan Pokhrel · Published 2026-05-11 · Updated 2026-05-14 · CVE-2026-42838

Positive Technologies (AI Summary)

CVSS v2.0

6.4

Medium

Base vector

AV:N/AC:L/Au:N/C:P/I:P/A:N

Name of the Vulnerable Software and Affected Versions Microsoft Edge (Chromium-based) (affected versions not specified)

Description Improper neutralization of special elements in output used by a downstream component (injection) allows an unauthorized attacker to elevate privileges over a network.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

LPE

Special Elements Injection

Weakness Enumeration

CWE-74

Related Identifiers

BDU:2026-06747

CVE-2026-42838

Affected Products

Edge

References · 11

• https://bdu.fstec.ru/vul/2026-06747 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42838 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42838 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42838 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-42838 · Vendor Advisory
• https://reddit.com/r/Action1/comments/1tcxu4s/action1_showing_microsoft_edge_vulnerabilities_on · Reddit Post
• https://twitter.com/infoflowcloud/status/2054342391058878579 · Twitter Post
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-42838 · Note
• https://twitter.com/vuldb/status/2054622602703098318 · Twitter Post
• https://twitter.com/CVEnew/status/2054341002987528637 · Twitter Post
• https://t.me/CVEtracker/53525 · Telegram Post