CVE-2025-15277 | FontForge GUtils SGI File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

FontForge GUtils SGI File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of FontForge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of scanlines within SGI files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-27920.

Published: 2025-12-31 Last update: 2026-01-07 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-15277 is rated Low Risk (37.3/100): CVSS High severity, with low exploitation likelihood (EPSS 0.26%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-15277

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.06% 0.26% +0.20%
2 2026-06-10 0.05% 0.06% +0.01%
3 2026-05-28 — 0.05% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-15277

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.0 HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]

Weakness enumeration for CVE-2025-15277

OS Trackers for CVE-2025-15277

vendor priority summary link
alpine — CVE-2025-15277: 1 source package rows (fontforge); 5 state rows across 2 repos (3.23-community, edge-community); fixed 0, open 5. https://security.alpinelinux.org/vuln/CVE-2025-15277
debian not yet assigned CVE-2025-15277 not yet assigned priority: Debian including 1 source packages (fontforge), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2025-15277
redhat high — https://access.redhat.com/security/cve/CVE-2025-15277
suse high — https://www.suse.com/security/cve/CVE-2025-15277/
ubuntu medium CVE-2025-15277 medium priority: Ubuntu including 1 source packages (fontforge), 8 status rows across 8 suites (bionic, focal, jammy, noble, plucky, questing, upstream, xenial): deferred 6, ignored 1, needed 1. https://ubuntu.com/security/CVE-2025-15277

Affected software / configurations for CVE-2025-15277

Vendor Product Version Raw CPE
fontforge fontforge 20251009 cpe:2.3:a:fontforge:fontforge:20251009:*:*:*:*:*:*:*

References for CVE-2025-15277

cvelogic Threat Intelligence