VulnerabilityPublished 26 Oct 2026

CVE-2026-86991: A buffer overflow was addressed with improved bounds checking

Source GCVE Database

Authoritative record:CVE-2026-86991· Medium

Not known to be exploited : upgrade to 27.2 or 26.7.2 when convenient.

Data as of 26 Oct 2026, 22:29 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Patch: Available – fixed in 27.2, 26.7.2, 15.8.2

Exploitation evidence

Disclosed: evidence found.
CVE published 26 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-vw4g-5gw4-8g5h

What to do

Upgrade iOS and iPadOS to 27.2 or 26.7.2; macOS to 27.2, 26.7.2 or 15.8.2; visionOS to 27.2.

Affected software

Product	Affected	Fixed in
AppleiOS and iPadOS	Affected <27.2	Fixed in 27.2
AppleiOS and iPadOS	Affected <26.7.2	Fixed in 26.7.2
ApplemacOS	Affected <27.2	Fixed in 27.2
ApplemacOS	Affected <26.7.2	Fixed in 26.7.2
ApplemacOS	Affected <15.8.2	Fixed in 15.8.2
ApplevisionOS	Affected <27.2	Fixed in 27.2

AI-suggested

Apply the official fixes by updating to iOS 26.7.2 or 27.2, iPadOS 26.7.2 or 27.2, macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2, or visionOS 27.2. These updates contain the improved bounds checking that addresses the buffer overflow.

Description

A buffer overflow vulnerability was addressed by improving bounds checking in several Apple operating systems. The flaw could cause unexpected process termination when processing a maliciously crafted file. Fixed versions include iOS 26.7.2 and 27.2, iPadOS 26.7.2 and 27.2, macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2, and visionOS 27.2.

References

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